The structured development of valve industry is speeded up in China

China Valve industry in the people economic growth, as the key, in the process of manufacturing of a nervous have very intense influence, national economy and people's livelihood in the tension field, management and disposal of industrial waste water, atmospheric will network requires a lot of in such aspects as reform localization of valve set, to satisfied the people economic industry's request for valve production, complete superstition growth of the industry, take the lead in growth, sound and rapid growth, seize market opportunities at home and abroad, open up progress, happy will makes the right ball valve door the important production base in China.

Gate valves manufacture to harsh on quality control, strong to curb environmental, quality and time not neat to each property construction excellent growth and recovery in space. To complete the pinch valve and emergency ability localization, property of collecting valve there is still a long way to go, the valve board should be connect together, the same policy progress, localization of fantasy in fact not remote. Valve industry is manufacturing a tension structure division, to the people to the economic growth of the dying of the influence. Skills of the other depends on WaiYang import valve, but need to have first is the nature of consciousness to cultivate high talent.

The entire valve industry's biggest problem at present is a prominent structural contradictions. These structural contradictions cautious points clear of a outstanding a lot of problem, and then compared with abroad, there are the obvious gap, although foreign big enterprises and brands, but they are small and exquisite, high-end equipment, leading products, strong technical force, not quantity, pay attention to quality.

The valve industry in China is at a critical period of development, on one hand forged steel gate valve industry and nearly 20 years after reform and opening up 30 years of rapid development, accumulated a huge amount of energy, production capacity of excessive supply exceeds demand, enterprises are eager to expand the market size valve, seek the new development direction; , on the other hand, the valve industry accumulated a staggering amount the size of the enterprise. Scale above valves enterprises more than 1500 across the country, and how many valves enterprises below the size? Who also said not clearly, that is to say, a total of 5000 enterprises around China valve industry.

Product structural contradiction is prominent, then compared with abroad, performance in the national construction need of major technical equipment key valve can not timely implementation localization, still need to import large quantities; The whole product structure in the valve industry, high-end valves proportion is not big, mainly concentrated in low - and valves, product prices appear vicious competition, seriously affected the healthy development of the industry. Because the production license system is not strictly carry out, low valve production capacity for rapid expansion over the years, the valve products to further expand overbuilt, increasingly mid-range valve market competition intensified.

How to choose flanged ball valves and female Screw Ball Valve

Flanged ball valves and internal thread ball valve should be how to choose, when a lot of units in the design of pipeline will take this factor into consideration.

First of all, flanged ball valves and internal thread ball valve each have each advantage. Flanged ball valve advantages: convenient disassembling in the pipeline, suitable for some medium and large chemical project. Resistance to acid and alkali stability, resistance to pressure ability strong, lasting stability in use. Flange ball valve disadvantages: the high cost, the volume is bigger, installation time, generally need two completed two or more persons. Choose average is DN15 - DN25 caliber. Internal thread ball valve: the advantages of small volume, convenient installation, generally applicable to domestic outfit building, or a steam pipeline, such as small pipes. Cheap, low cost for factory unit. The defect of internal thread ball valve: damage is not easy to tear open outfit, especially fixed pipe. Continued weak. Able to work under pressure General selection is in (the following the specifications of the ball valves.

Comprehensive view, flanged ball valve and each have advantages and disadvantages of internal thread ball valve, customers can choose according to their actual usage, the working principle is the same. The difference is prices higher than internal thread ball valve flange ball valve, size large

The summary of steel pipes and the impact of it on life

The development of seamless steel pipe production technology began with the rise of the bicycle manufacturing industry. oil exploitation in the early years of the 19th century development, during the two world wars, aircraft, ships, boiler manufacturing, after the second world war thermal power boiler manufacture, the development of chemical industry and oil and gas drilling and transport, etc., effectively driving the Steel pipe industry in the development on the varieties, yield and quality.

Steel pipes used for conveying fluid and solid, not only to exchange heat, manufacturing machinery parts and containers, it is also a kind of the steel. Building with steel pipe manufacturing network frame structure, pillar and mechanical support, can reduce weight, save metal 20 ~ 40%, and can realize the mechanization of factory construction. (tianjin steel pipe company processing workshop with steel pipe space truss structure, the actual save up to 42.9%) steel, made of steel highway Bridges not only can save steel, simplify construction, but also can greatly reduce the area of the coating layer, save investment and maintenance costs. So, any other types of carbon steel pipe products cannot completely replace steel, but steel tube can replace part of the profile and bar. Steel pipe to the national economic development and improvement of human quality of life, is far better than the other steel products. From People's Daily utensils, furniture, drainage, gas supply, ventilation and heating facilities to various kinds of agricultural machinery equipment manufacturing, the development of underground resources, defense and aerospace used guns, bullets, missiles, rocket, etc, is inseparable from the steel pipe.

Is due to the steel tube is closely connected with human life and production activities, steel industry production technology has developed rapidly, not only but also, pipe production in iron and steel industry plays an irreplaceable position.

The development of Valve manufacturing process cater to diversification

For now the valve market phase, it is China valves products renewal stage, the transition from low-end to high-end products, from a single product to the transition of diversified products, for valves industry development provides a good foundation. High-end products introduced to the domestic and abroad, will also introduce some advanced technology and management mode.

From the time, the valve industry overall level is not high, in China a few years ago more small and medium-sized enterprises, start low, for some small workshops. In recent years, change is bigger, it is the improvement of personnel quality; 2 it is to raise the level of manufacturing technology and management such as former ze valve factory, in the process, management has a quite high level.

Valves from manufacturing point of view, the current domestic production craft level is uneven, foreign many large valve manufacturers as their products processing base in China, many mainland companies into the international valve market.

Look from the traditional valve, one is electric this block, such as manual valves, hydraulic valves, electric valves developed rapidly; Second is building valve, power station, oil valve, etc., update speed is faster.

In addition, the valve spare parts market demand is very big. A small processing plant in Shanghai, valve production process is very backward, but it is all over the country sales force of more than 10, ten thousand people. The valve industry in China after years of accumulation and increase steadily, and now is the world's biggest producer of exports has grown steadily each year.

In the future, the development of China's valve industry will tend to be diversified, technology level is higher and higher, the quality will also present the high quality. Combined with China's valve industry planning and management and the implementation of preferential policies, China's valve industry will more and more development space.

The new measures of China valves assist work to achieve a new leap

Huaxia valve believes that people are lazy, if only by the staff's consciousness, lack of necessary supervision and inspection, the inspection, a lot of work is hopeless. And, only on the supervision of the cadres is not enough, employees at the grass-roots level is the most easy to find problems around. Therefore, China gate valves has always attached great importance to business administration supervisory work, although in the heart of the restructuring process in March orgnaization of business ministry of supervision and total merged to form the administrative management department, but the function of business administration of supervision and staff did not cut. Especially in the company is in good development trend, development prospects are bright, more need to strengthen business administration supervisory work, to strengthen enterprise management, prevent and stop all illegal discipline phenomenon, promote the company and employee in accordance with the work here, so as to improve the market competitiveness of enterprises.

Therefore, huaxia valves in revising and perfecting the system of corporate governance and supervision in the issuance of the at the same time, building a part-time business administration inspector team, mainly for supervisory department work.

Huaxia valve also determines the "grasping foundation, heavy innovation; optimal cost, lift efficiency; extension market, control risks; YanGuiZhang, check the implementation of" work principle, determined to work through a series of effective measures, further arouse the enthusiasm of cadres and staff work hard, to adapt to the development of the situation, continue to create a new situation of the sustainable development increasingly, truly achieve "the leading domestic, the world first-class, power station valve leading" corporate vision.

Meng Yingkai also to decorate, monitor monthly work tasks required part-time inspector took seriously, justly due, when reporting the irregularities in the collection, stick to facts, not the right person, to avoid time and go through the motions, timely collecting, sorting and provided by the month to violate the company rules and regulations and process problems, irregularities and illegal phenomenon and cadres of the departments work not as a behavior, the festering problems in the work, the company in the production and business operation activities of all kinds of events, safety and all kinds of waste phenomenon; And shall have the right to stop and correct any violations, violations found in work, have the right to put forward amendments to the company rules.

Spring Festival eve, huaxia valve borrow brain from all the staff, open for steel appearance quality and packaging quality rationalization Suggestions, in order to promote company efforts to improve the quality of steel body appearance quality and product packaging, further to meet customer requirements. After soliciting activities, the company rationalization proposal review team will be to review all proposals and operable Suggestions for award.

The historical source of valves

Valves as the fluid pipeline production. Humans use valve has a history of almost 4000 years. In ancient China, vacuum salt brine from the brine well, the once used wooden plug valve in the bamboo pipe. In 1800 BC, the ancient egyptians to prevent the Nile flood and construction of large-scale water conservancy, had similar wooden plug is used to control the flow of the distribution. These are the prototype of the valve. The application of industrial butterfly valves, from watt invented the steam engine began. Appear early in the twentieth century the cast iron, cast steel, forged steel, stainless steel, chrome molybdenum steel, brass, ductile iron, etc all kinds of valves. Used in various industries, various industrial and mining. Domestic first to introduce the foreign valve production technology company, after the introduction of foreign production technology, make domestic valve production technology breakthrough, improve quality, longer service life.

1 - December, 2009, the cumulative production of valve 4583935.72 tons, compared to 2008 increased by 3.74%; 1 - December, 2010, our country the valve output for 5390394.75 tons; 1 - December, 2011, the production of valves for 5958729.61 tons; 1-2012 on April the valve output up to 2041987.98 tons in our country.

Valve products strong demand of the market, state-owned economy steady development, gradually expand the investment in fixed assets. Especially several century project "west-east gas", "China" and "south-north water diversion" project construction need a lot of valve products such as matching; In addition, our country is faced with the advent of the era of industrialization, the department of department of petrochemical industry, electric power, metallurgy, chemical industry and urban construction using large valve will increase the demand for valve products.

Alloy Steel Seamless Pipe

ASME SA335 P11/P12/P22 Alloy Steel Pipes, and also the first mill start processing High temperature high pressure alloy seamless pipe in local market. Through the business, we guarantee every Pipe we are shipping the customer all come with BV or TUV TPI certificate, and we can guarantee every PCS have been inspected by different parties at least three times to guarantee the safety of the usage.


Size:


ZGL have got three completer production line as:


Cold drawn from size 3/4"-5" OD pipe.


Hot rolled from size 1"-16" OD pipe, also we can work from size 20"-24" as hot expand pipe.


Wall thickness can be max 100mm now.


One new production line for seamless Rectangular steel Pipe


Materials:


Carbon steel pipe for liquid: ASTM A106/A53 GR.B, ST37, ST44.


Alloy pipe: P110, A335-P12, A335-P11,12Cr1MoV, 15CrMo, 37Mn5, 30CrMnSi, 27SiMn.


For pipeline: API 5L GR.B, X42, X52, X60, X70.


For construction: high thickness of ST44, ST52.


For mechanical process: C45, SAE1045.


Thickness: 2.77 - 23.01 mm


Section Shape: Round


Outer Diameter: 21.3 - 219.1 mm


Model Number: Grade: B, X42


Standard: API 5L: Grade: B, X42


Brand Name: Double-Ring


Features:


1) Seamless steel pipes for pipeline


2) Manufactured in accordance with API Spec 5L

Metal Seal Utilized in Valves to Protect from High Temperature Damage

With the Valves heated in a fire application, the non-metal material parts such as seat sealing ring of PTFE, stem back seat gasket, gland packing, and the sealing gasket between body and bonnet might disintegrate or be damaged due to high temperature. Landee’s specially designed structure of auxiliary metal to metal seal is provided to effectively prevent both internal and external leakage of the Valves. Consider the case of long-term use, usually only do not use at 120 ℃. Valve is opening and closing parts of reciprocating rotary disc is about 90 ℃ to open, close and adjust a ball valve fluid channel.


Advantages:1, simple structure, small size, light weight, open and close rapidly, flow resistance coefficient; 2, can be used with suspended solid particles in the medium, based on the strength of the sealing surface can also be used in powder and granular media. Applicable to two-way opening and closing the ventilation and dust regulation, widely used in metallurgy, light industry, power, petrochemical and gas pipeline systems and other waterways.


Disadvantages: 1, flow control is not the scope, when the open up to 30%, the flow will be into more than 95%; 2, the structure of the Butterfly Valves and sealing material constraints, not for high-temperature, high pressure piping systems. General operating temperature below 300 ℃, PN40 (6 ~ 40) below. 3, the sealing performance relative to the valve member of this network for the scouring pump published, reproduced must be attached to the address rights reserved.

Carbon-Manganese Seamless Steel Pipes for Ships

Description:

Size Range：OD 1"~8" , WT 1.24mm~22.23mm L Max 14000mm.

Type of End-Finish：BBE or PE

Coating: Passivation and oiled, galvanized, Black paint or varnish

Packing: Plastic plugs in both ends, bundles of max. 3,000kg with several steel pipe strips, Two tags on each bundle, Wrapped in waterproof paper and sackcloth with several steel strips

Mill Test Certificate: EN 10204/3.1B

Specification

BS(British Standards)

BS3059 PART1 / Steel Boiler and Super heater Pipe

(HFS320/CFS320/ERW320/CEW320/HFS320/CFS320/ERW320/CEW320)

BS3600 / Dimensions and Masses Per Unit Length of Welded and Seamless steel pipe.

and for Pressure Purposes

Addition: covered with NACE MR-0175,

Usage: Heat Exchanger; low-temperature serve; Shipbuilding ect.

Demand For Electric Resistance Welded Pipes

Global shipments of ERW Pipes are projected to reach 91.5 million tons by the year 2018, primarily driven by intensifying oil and gas exploration and transmission activity, particularly for shale gas projects.

In addition to common markets of oil and gas pipelines and water infrastructure, SSAW Steel Pipe and tubes are increasingly being targeted at newer sectors such as urban infrastructure, construction, metros, piped gas distribution, fire safety segments, malls, airports, and commercial passenger vehicles. In these markets, pipes and tubes are used in applications such as fencing, cabling, fire safety, scaffolding, and bus body parts.

Continuous rise in infrastructure investments in sectors such as power generation and automotive and increasing government investments in infrastructure projects including water and sewage systems augur well for the ERW pipes market.

The global market for seamless Pipe and tubes is projected to reach 113.8 million tons by 2018, with demand growth mirroring the dynamics of the energy sector and gains led by the rise in rig count and increasing prices of oil and gas, particularly in North America, the Middle East and Latin America.

Underground Pipe Locator for Unmarked Plastic Pipe

This is a revolutionary new underground pipe locator, locates underground utilities even unmarked plastic pipe. Now underground utilities previously thought “unlocatable,” such as polyethylene Pipe with no tracer wire (or damaged wire), can now be located even without system access. This utility locator can be used on any plastic, metal, concrete, clay, fiberglass, cast and Ductile Iron Pipe. The APL senses through most surfaces, such as: concrete, asphalt, gravel or soil. The “acoustic pipe locator” works on ultrasound technology, and plays well within the +/- 18 inch regulatory requirements. Actually, the unit locates within +/- two-four inches in general. The operation is quite easy, and below is how it works: Set the APL on the ground in a way to create a good ground contact. When pressing a button on the display the transmitter (actuator) sends ultrasonic waves (set of “pings”) down into the ground. Receivers (accelerometers) listen for the reflected ping. The operator can then move the APL 6”-12” to the right (or left) and activate the transmitter again. The strength, speed and duration of the echoed pings are monitored by the locator. Each press of the button is referred to as a “slice” and a set of slices is a scan. After multiple scans and pressing the “Pipe map” button the APL displays the location of the pipe. From the APL manual: “The APL locates the voids in the ground created by a pipe through the science of impedance mismatch. The speed of sound through ground materials versus the internal portion of a pipe (even when filled with liquid) is detectable using the APL. The acoustic wave pattern of specific timing and frequency is monitored and processed using the accelerometers. Based on the return signature the instrument will determine if a void is present within the minimum requirements as set in the software.”

Gas and Water Demand Drives Requirement of Continuous Welded Pipes and Tubes

GIA declares the release of a total report in globe on the Continuous Welded Pipe and Tubes markets.

Global market for Continuous Welded Pipes and Tubes is aimed to reach 24.2 million tons by 2018, driven by the continuous need to meet the global gas and water supply requirements. Oil and gas industry generally exhibit resilience to periods of economic slump due to the fact that energy requirement continues to rise even when conventional reserves of oil and gas are shrinking rapidly. Apart from the energy sector the demand for seamless pipes and tubes also emerges from automobile, power generation and fertilizers markets, among others. 

Demand growth for seamless steel Pipe is expected from high energy-consuming countries across Middle East, Asia, Australia, and Latin America, which are intensifying oil and gas exploration activity to meet the escalating demand from respective domestic markets. Escalating demand for energy from emerging nations and the subsequent increase in the number of crude oil and gas development projects are expected to enhance the demand for SSAW Steel Pipe and tubes. 

In developed regions, significant demand for seamless pipes is expected from replacement of existing pipe systems, as most of these systems were established more than three decades ago and are thus approaching the end of their useful life. Increase in offshore drilling operations and anticipated rise in refinery and chemical plant activity levels are also expected to augur well for the seamless pipes market.

High Quality LSAW Steel Pipe In Unique Design

LSAW Steel Pipe:

Annually produce 150 thousand tons of DN80mm-DN2600mm ductile iron pipes of Landee brand with the length of six meters and eight meters. Because of the excellent performance and quality, the product upgrades the reliability of the Pipe network and is considered as the important promoting project of scientific and technological achievements by national ministry of construction, and it is judged as Famous Brand of China.

1) OD:219-2020mm

2) WT:5-20mm

3) Material: Q235

4) Standard :API SPEC 5L

5) WT Tollerance:WT+(-)12.5%

6) Length :5.8-12m

7)Application: petroleum and natural gas industries steel Pipe for pipe lines technical delivery conditions for low pressure liquid transportation used for petroleum and natural gas industry, chemical industry, electric industry, and steel construction, drainage project and city construction etc.

8) Payment terms: TT% or TT30% in advance , the balance of 70% should be paid by LC at sight.

9) Delivery time: at the earliest time

Pakistan Customs Nabs A Plan for Misapplying of Steel Pipe Manufacture

Pakistan Customs officials deputed at Torkham border have busted a gang of nine LSAW Steel Pipe and polyethylene pipe manufacturers who made approximately PKR 450 million duty evasion under Duty and Tax Remission for Export scheme on flying export of mild steel.


The nine companies, Shaheen Pipe Industry, Shaheen Pipe Industries (Pvt.) Islamabad, Rawat Steel Industries Islamabad, Paramount Steel Industries Lahore, Bashir Pipe Industries (Pvt.) Limited Railway Road Lahore, Modern Pipe Mills (Pvt.) Limited. Lahore, Supreme Tube Industries Lahore, Alpha Industrial Establishment and Pir Customs Clearing Agency Torkham are cheating the Federal Board of Revenue by flying export of steel mild Pipes Valves to Afghanistan and claiming millions of rupees under DTRE concession from the national exchequer. The flying exporters showed 140 trucks loaded of mild steel pipe and steel tubes, which were sold in local market while duty was claimed.


The customs has registered 12 different FIRs against these companies and importers, exporters and custom clearing agents involved in the business of flying exports of mild steel Pipe. The customs officials succeeded in unearthing the gang after rigorous works of more than two months.


First break trough was made on December 10 2012 when the customs officials arrested accused Muhammadullah along with his other accomplices namely Qari Ahmed and Naib Shah working for Pir Customs Clearing Agency filed good declarations for the export of MS Pipes loaded in vehicles under the regime of manufacturing bond on behalf of Shaheen Pipe Industries.

Metal Seated Ball Valves Represents Economical Solutions for Key Applications

Metal seated ball valves were introduced to solve problems associated with soft-seated Valves whose performance too often degraded in applications that challenged their service limits. The primary advantage of metal over soft seats is their ability to withstand high temperatures and severe service conditions.


Metal-seated valves are designed for service temperatures up to and exceeding 1,000 F. Proven in the field, they provide uninterrupted service with the highest shut-off standards for longer time-in-service than soft-seated ball valves.


In metal-to-metal seating, dependent on service conditions, application of various coatings allow the ball and seat rings to be hard faced on the sealing areas. Coating examples include electrolysis nickel plating, satellite hard facing, chromium carbide and tungsten carbide. Sealing is assured by metal-to-metal contact between the two hard-coated surfaces.


Choosing the right seat material is the most challenging decision in ball-valve selection. For the most effective solution, the more application information available, the better the materials selection will be.


Metal-seated Ball Valves installations can adhere to shut-off standards, including ANSI/FCI 70-2-1976 for allowable leakage. Actually, a certain amount of leakage is allowed and is measured by the number of bubbles of air that escapes per minute in established testing.


Metal-seated valves are expensive, but when the cost in downtime due to failure and in replacement of soft-seated valves is factored in, total cost of ownership may actually favor metal-seated valves for the same application.

Gear Operated Gate Valves

Bonnets provide leak proof closure for the valve body. Gate Valves may have a screw-in, union, or bolted bonnet. Screw-in bonnet is the simplest, offering a durable, pressure-tight seal. Union bonnet is suitable for applications requiring frequent inspection and cleaning. It also gives the body added strength. Bolted bonnet is used for larger Valves and higher pressure applications.


Another type of bonnet construction in a gate valve is pressure seal bonnet. This construction is adopted for valves for high pressure service, typically in excess of 15 MPa (2250 psi). The unique feature about the pressure seal bonnet is that the body bonnet joints seals improve as the internal pressure in the Valves increases, compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.


Specifications of Gear operated gatevalves:


1) Size: 2 - 60"


2) Class: 150lb - 2500lb


3) Material: WCB, LCB, CF8 304, CF8M 316, CF3 304L, CF3M 316L, WC1, WC6, WC9, CN7M, Monel etc.


4) Standards:


a) Design and manufacture: API 600, API 6D


b) Inspection and test: API 598, API 600, API 6D


c) End flange dimensions: ANSI B16.5, ANSI B16.47


d) BW end dimensions: ANSI B16.25


e) Socket-weld dimensions: ANSI B16.11


f) Face to face and end to end: ANSI B16.10

Gas Steel Pipe Was Cutout by A Plow Truck

According to a press release, emergency personnel directed traffic away from a gas leak at Sunset School Saturday morning.

Alpena Fire Department personnel responded at 5:38 a.m. after a plow truck struck gas meter attached to the school, according to the release. The driver accidentally backed into the yellow hazard pole, cutting it off at ground level and then striking the gas meter. The accident broke the gas Pipe off below the meter and the shut-off Valves, and a DTE Energy staff had some trouble in stopping the leak. City police redirected traffic away from the scene, and Hobbs drive was temporarily closed between Third Avenue and Grant Street.

After an attempt to seal it off with a press tool unsuccessfully, more gas company personnel were called to the site, according to the release. They could slow the leak steel pipe using a wood dowel, at which point police opened Hobbs Drive to traffic again. With the help of a hydraulic clamp wrench, the DTE staff could stop the leak totally. Firefighters and DTE personnel checked the school for explosive levels and ventilated the structure.

Nobody was injured, although the plow truck suffered damage in the accident, according to the release.

Basic Advantages of Using Pressure Seal Gate Valve

On the whole, the valves are used to either stop or start the flow of water, for which can either be used to fully open or fully close the flow of liquid. Partial flow of water is impossible with the use of these types of valves, because the opened valves can causes inevitable damage to the Valves.

Nevertheless, there are many advantages of using Pressure Seal Gate Valve. It helps to completely shut down the flow of liquid. It is known to have incomparable sealing properties. The durability of the pipes can be guaranteed as the loss of pressure is minimal use of these valves. Today these valves can be bought from any of the leading online business portals at attractive prices.

Actuated Gate Valves is one of the most popularly and widely used Valves for domestic and industrial goals. This valve is specifically used to acquire uninterrupted flow of water. Used mostly in isolated applications, this valve is greatly preferred because once the valve is in an open position; there is complete drop in the pressure which is due to the retraction of the gate into the bonnet.

According to specific designs, this valve is divided into different categories. The most commonly used valves include the flexible wedge and the solid wedge gate valve. There are different types of flexible wedge valves which utilises twin disc parts which are flexible. The parallel side valve is one of the most commonly and widely used flexible wedge valve. These valves are obviously used in the stem systems as it can stand expansion and contraction under varying climatic conditions.

LSAW Steel Pipe and Tube

Details：

ShengTai company is a professional steel pipe manufacturer of china ,we can produce LSAW Steel Pipe and tube ,we have various size of LSAW Steel Pipe and tube and according your request to produce ,if you need this products ,we can provide the best price of LSAW Steel Pipe and tube for you. 

Steel Pipe Materials: Gr.B x42, x46, x52, x56, x65, X70,X80,ST37 and Q345

Process method: Longigudinally Submerged Arc Welding (LSAW)

Surface finish: 3PE/black painting/Galvanization/varnish coating

Outer diameter: 219mm to 3620mm

Wall thickness: 5mm to35mm

Length: 12m or customized

Standards: API 5L, ASME,DIN and EN

Treatment: ends with caps or beveled

Packing: ends with caps /bevel ends /bulk/bundle

Application range: water treatment project,petroleum pipelines, natural gas pipelines, coal gas pipelines, water supply pipelines, drainage water pipelines, heat supply network pipelines, pressurized air pipelines, common gas pipelines, construction foundation piles, steel structure buildings, steel structure bridges, seaports, and docks.

New Pipeline Compressor was Introduced by GE Oil & Gas

Expanding its innovative Integrated Compressor Line (ICL), GE Oil & Gas has introduced its first single-stage ICL, designed for low pressure ratio applications such as pipeline compression. Featuring 20% more operating range flexibility and greater efficiency, the new product was recently unveiled at the GE Oil & Gas 2013 Annual Meeting in Florence, Italy.

The single-stage ICL has a simple design with only two magnetic bearings and no split parts and offers full access to critical components. With its very simple and robust architecture, the product costs about the same as a conventional BCL/PCL compressor, but has lower operating costs.

While the previously introduced ICL products are primarily designed for gas storage applications and feature multi-stages and multi-impellers, the new product is the first with only one impeller in the industry. This design enables high performance in applications where the requested design pressure ratio is very low (1.1:1.4), such as gas compression stations.

The impeller used in the single-stage ICL is from GE’s proven impeller family.

Because of its customised shape, the impeller transfers the power from the motor to the gas by quikening it. Then the static part at the outlet of the impeller transforms the speed of the gas into pressure. For a pressure ratio below 1.4, the optimised design of the single stage ICL enables very high efficiency and reduces the electrical power consumption compared to a multi-stage ICL or conventional centrifugal compressor.

The single-stage ICL offers a power range of 2 – 15 MW, design inlet pressure of 20 - 80 bar, discharge pressure up to 120 bar and maximum speed of 18 000 rpm. The new product is available globally, with the first commercial applications expected in the 2014 - 2015 time frame. Today, 16 ICL units are running and have accumulated more than 33 000 running hours and 1000 starts and stops for gas storage and pipeline operation in Europe.

Basic Contents of Butterfly Valves

A butterfly valve is a quarter-turn rotational motion valve, that is used to stop, regulate, and start flow. Butterfly valves are easy and fast to open. A 90° rotation of the handle provides a complete closure or opening of the valve. Large butterfly valves are usually equipped with a so-called gearbox, where the hand wheel by gears is connected to the stem. This simplifies the operation of the butterfly valves, but at the expense of speed.

Advantages of butterfly valves:

Compact design requires considerably less space, compared to other valves Light in weight Quick operation requires less time to open or close Available in very large sizes Low-pressure drop and high-pressure recovery Disadvantages of butterfly valves. Throttling service is limited to low differential pressure Cavitation and choked flow are two potential concerns Disc movement is unguided and affected by flow turbulence Image of a typical Butterfly valve, Lug Wafer type design. The image is used with permission from Cameron International Corporation

which keeps all rights to this image. On the right of this page, you will find a link to a large image of that Butterfly valve.

Types of Butterfly Valves:

A butterfly valve has a short circular body, a round disc, metal-to-metal or soft seats, top and bottom shaft bearings, and a stuffing box. The construction of a butterfly valve body varies. A commonly used design is the wafer type that fits between two flanges. Another type, the lug wafer design, is held in place between two flanges by bolts that join the two flanges and pass through holes in the valve's outer casing. Butterfly valves are even available with flanged, threaded and butt welding ends, but they are not often applied.

Seat Disk and Stem of A Butterfly Valve:

Stopping flow is achieved by the valve disk sealing against a seat that is on the inside diameter periphery of the valve body. Often an elastomeric seat material will be used. Disk and stem of a butterfly valve consists of two parts, Butterfly Valves and there a two methods to be fastened together. In the first method, the disk is bored through and secured to the stem with bolts or pins. The second method involves boring the disk as ever before, then shaping the upper stem bore to fit a squared or hex-shaped stem. This method allows the disk to "float" and seek its center in the seat.

Typical Applications of Butterfly Valves:

A butterfly valve can be used in many different fluid services and they perform well in slurry applications. The following are some typical applications of butterfly valves: Cooling water, air, gases, fire protection etc.