Some of the benefits of pipe fittings

Welded connection offers more robust connection

Continuous metal structure adds to the strength of the piping system

Butt-weld fittings with matching pipe schedules, offers seamless flow inside the pipe. A full penetration weld and properly fitted LR 90° elbow, Carbon Steel Reducer, Concentric reducer etc. offers gradual transition via welded pipe fitting.

Happy Chinese National Day

The Central People’s Government announced that it will be the founding day of the People’s Republic of China on October 1 of each year since 1950.

For any country, the significance of the National Day is extraordinary. All countries will hold meaningful activities on the day of National Day to strengthen the patriotism of their people and enhance the cohesiveness of the country.

WH-STEEL have high quality Barred Tees and Carbon Steel Reducer, We will have a 7-day holiday, have anything please leave me a inquiry, we will contact you as soon as possible!

Introduction to the advantages of stainless steel elbow

1. The inner wall is smooth: the smoothness of the inner wall of the stainless steel elbow pipe fitting avoids the occurrence of impurity condensation, and is the most ideal material for construction.

2, good temperature resistance: Some pipes begin to precipitate harmful substances at 40 ° C, and produce odor; some pipes in the inner wall under the temperature of corrosion rate is very fast, shortening the service life of the pipe. Welded Elbow fittings will not be precipitated. Stainless steel can work safely for a long time at -270~400 °C with stable performance.

3, high tensile strength: tensile strength greater than 530n / m2 is 2-10 times higher than the general water pipe material.

4. Unique passivation effect: PH value, air, dissolved oxygen, impurities, water treatment agent, etc. in water can all be the cause of corrosion of pipe fittings. The stainless steel pipe has a thin, dense oxide film that acts to react with the oxidant and prevent further oxidation reactions.

5, excellent wear resistance: If the pipe is easily invaded by the water flow, it will become a healthy killer. Stainless steel fittings can withstand operation in fluid environments up to 20 m/s.

2018 Major event of WH Steel

Dear customers, WH Steel will participate in the following major exhibition as an exhibitor in 2018.

We sincerely invite you to visit this events. We hope to meet you at the exhibition and discuss our products with you.

They are :

1、The 18thChina International Petroleum & Petrochemical Technology and Equipment Exhibition 

Time: March 27-29, 2018

Location: Beijing China international exhibition center (new museum)

2、Tube 2018 Germany

Time: April 16-20, 2018

Location: Duesseldorf,German

3、The 8th China international pipe exhibition

Time: September 26-29, 2018

Location: Shanghai

4、Kazakhstan International "Oil & Gas" Exhibition and Conference.3-5 October 2018

Time: October 3-5, 2018

Location: Almaty,Kazakhstan 

PIPE FLANGES APPLICATIONS

Pipe flanges are disc-shaped fittings that are commonly used to build piping systems. Flanges can add support to a pipeline, close or block an existing pipeline, or they can be used for creating joints and attaching additional pieces to the system. When connecting to a system, Integral Flange can be bolted or welded together, and there are 6 basic types of flanges that are used for different piping systems.

Aside from plumbing, Socketweld flange are commonly used in industrial settings where pipelines are necessary. For instance, flanges are a common piece of hardware in the oil and gas industry, as well as in chemical production plants.

The main types of stainless steel elbow

1. A tubular member having a flange and a rounded edge, the former means that the end of the pipe is convex toward the inside or the outside, and the latter means a pipe member which forms a bulge or a groove in the circumferential direction of the pipe;

2. The Stainless Steel Elbow China becomes a wall-thickness pipe, which means that the wall thickness changes along the length of the pipe;

3. Stainless steel elbow bending pipe fittings, we contact more, that is, the straight pipe becomes a curved pipe with different radius of curvature, such as elbows, elbows, etc.;

4. Stainless steel elbow variable diameter pipe fittings, the diameter of a part of the pipe end or pipe is reduced;

5. Pipe fittings with crimping and sealing type, which increase the total strength of the pipe end to the outer side or the inner side of the pipe or to seal the pipe end;

6. Change the pipe fittings of the section and change the circular section into a square, an ellipse, a polygon, etc. as required.

TYPES OF ELBOWS

Although the names are mostly self-explanatory, there are a few variations in the elbows that are worth exploring.

The 90° elbow is also called a “90° ell” (pronounced like the letter “L”) or sometimes a “quarter bend” because the right angle at which flow is redirected is one quarter of 360°.

The 90° 3r elbow is used in spaces that require a major turn. Although this may be a necessity, the flow rate and pressure within the pipe is affected. Just as with any piping system, the material under pressure hits the elbow and would like to continue in the same direction. When it meets the resistance of the elbow wall, it is forced to change direction (deflected) at a cost to the pressure.

Precautions for welding stainless steel pipe fittings

1. In order to prevent corrosion due to heating, welding should not be too long, 20% less than carbon steel welding electrode, arc should not be too long, rapid cooling between layers, and narrow welding path is appropriate.

2. Stainless steel pipe fitting (Stainless Steel Bend) is quick to harden after welding, which is convenient for cracking. If with the typical stainless steel pipe welding, necessary to preheat above 300 ℃ and 700 ℃ after welding at the mercy of slow cooling treatment. If the welding piece cannot be heat treated after welding, stainless steel pipe welding rod should be used.

3. Stainless steel pipe fittings (Stainless Steel Elbow), for the purpose of improving corrosion resistance and weldability, appropriate amount of non-denatured elements such as Ti, Nb, Mo are added, which is better than stainless steel pipe fittings. Acceptance with typical chromium stainless steel electrode, should be above 200 ℃ preheat and at the mercy of 800 ℃ and tempering treatment after welding. If the solder can not be thermal treatment, cr-ni stainless steel welding rod should be used.

4、The welding rod of stainless steel pipe (Stainless Steel Cap) has exquisite corrosion resistance and oxidation resistance. It is widely used in chemical industry, chemical fertilizer, petroleum and medical machinery manufacturing.

5、The coating of stainless steel pipe has titanium calcium type and low hydrogen type. The titanium and calcium type can be used for ac and dc, but the welding is shallow and red at the same time, so dc power supply should be connected as much as possible

6、Stainless steel pipe has certain corrosion resistance (oxidizing acid, organic acid, gas corrosion), heat resistance and wear resistance. General used for power station, chemical, petroleum equipment equipment material. Stainless steel pipe welding is poor, should pay attention to the welding process, heat treatment before the selection of appropriate electrode.

7、Electrode manipulation should link when dry, titanium calcium type should be 1 hour after 150 ℃ drying, low hydrogen type should be 1 hour after the 200-250 ℃ drying (cannot be repeated many times to dry, or coated convenient cracking flake), beware of covering viscous oil and dirt, so as not to cause weld added carbon content and affect the quality of weldment.

8、When stainless steel pipe is welded, carbon is precipitated out by repeated heating to reduce the corrosion resistance and mechanical function.

Stainless Steel Stub End Introduction

We are manufacturer of Stainless steel Seamless stub end and supply high quality Stainless stub end in both large and small quantities worldwide and offer you the best prices in the market.

Stainless Steel Stub End are fittings used in place of welded flanges where rotating back up flanges are desired. A rotating back up flange seats itself against the back surface of the Stub End. When bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the Stub End. The gasket surface of the Stub End then presses against a gasket and another gasket surface providing joints like standard flange joints. The seal is made by the gasket surface of the stub end alone, the flange only provides the clamping pressure on the joint.

Cangzhou weihao invites you to attend the 11th China (dongying) international petroleum and petrochemical equipment and technology exhibition

The 11th China (dongying) international petroleum and petrochemical equipment and technology exhibition will be held September 19 to 21, 2018 held in shandong dongying Yellow River international conference and exhibition center, exhibition area of 40000 square meters, more than 400 exhibitors, we sincerely invite you to join this event, display products and technological achievements, looking for business opportunities, expand cooperation and trade, this paper discusses the current situation of world petroleum technology development and the future development direction.

Under such favorable conditions, "China (dongying) international petroleum and petrochemical equipment and technology exhibition" has been successfully held for ten consecutive sessions, which has received guidance and strong support from national council for trade promotion, governments at all levels and shengli petroleum administration bureau. At the same time, depending on the dominant advantages of local government and oil field, the exhibition will organize a large number of professional visiting delegations to visit the exhibition. The success of the oil equipment exhibition in dongying has set up a display and exchange platform for enterprises, promoted international procurement and trade, and played a strong role in promoting the establishment of "China oil equipment industrial base" in dongying.

Cangzhou weihao will attend this exhibition quietly with his own products, welcome visitors from all walks of life to visit our booth, we will be the most enthusiastic reception and the most perfect service system to serve you!

Contact:

Address: room 302, unit 3, building 4, zone 6, zifang yuan, fengtai district, Beijing

Tel: 010-67904626

Factory address: south of zhenggang road, xingma village, yanshan county, cangzhou city, hebei province

Tel: 0317-6392673

Fax: 0317-6392671

E-mail: sales@whsteelfittings.com

Web: http://www.whsteelfittings.com

Conversion of pipe diameter

1.Conversion of pipe diameter in inch and mm units:

1 inch =25.4 mm =8 GB (GB/ t50106-2001)

Pipe diameter shall be expressed in the following way :(pipe diameter shall be in mm)

① Water gas transmission pipe (galvanized or non-galvanized), cast iron pipe and other pipe, pipe diameter should be denoted by nominal diameter DN.

② Seamless steel pipe(Seamless Bend),, welded steel pipe (straight or spiral joints), copper pipe, stainless steel pipe and other pipe, pipe diameter should be expressed as outside diameter x wall thickness.

③ Reinforced concrete (or concrete) pipe, clay pipe, acid-resistant ceramic pipe, cylinder tile pipe and other pipe materials, the pipe diameter should be expressed in the inner diameter d;

④ Plastic pipe, pipe diameter should be expressed according to the product standard method;

⑤ When the design USES the nominal diameter DN to represent the pipe diameter, there should be a comparison table between the nominal diameter DN and the corresponding product specification.

The specification of rigid PVC pipes for building drainage is expressed by DE (nominal outer diameter) x e (nominal wall thickness) (GB 5836.1-92); Specification of polypropylene (PP) pipe for water supply

2. About the difference between DN and De：

1、DN refers to the nominal diameter of the pipe. Note: this is neither the outside diameter nor the inside diameter; It should be related to the British system at the beginning of the development of pipeline engineering; Generally used to describe galvanized steel pipe, its correspondence with British units is as follows:

4 in. : 4/8 in. : DN15;

6 in. : 6/8 in. : DN20;

1 inch tube: 1 inch: DN25;

Inch 2 tube: 1 1/4 inch: DN32

Inch and a half tube: 1 1/2 inch: DN40;

Two inch tube: 2 inches: DN50;

3-inch tube: 3 inches: DN80 (also labeled DN75 in many places);

4 inch tube: 4 inches: DN100; 

De mainly refers to the outside diameter of the pipe, which is generally marked by De.

Mainly used for description: seamless steel pipe, PVC and other plastic pipes, and other pipes that require clear wall thickness.

Taking galvanized welded steel pipe as an example, two labeling methods of DN and De are as follows:

DN20 De25X2.5mm

DN25 De32X3mm

DN32 De40X4mm

DN40 De50X4mm ………

① We are accustomed to use DN to label welded steel pipe, and rarely use De to label pipe without involving wall thickness.

② But labeling plastic tubes is a different matter; Or is it related to the industry habit? In the actual construction process, the pipe named 20, 25 and 32 refer to De, not to DN. There is a difference of one specification. It is easy to cause losses in the process of procurement and construction if we do not make clear.

③ The two types of pipe materials are connected in the same way: thread connection and flange connection. Other connections are used less frequently.

Galvanized steel pipe (Galvanized Threaded Elbow) and PPR pipe can use the above two connections, only less than 50 pipe thread more convenient, more than 50 flange more reliable.

Tube China 2018 - The 8th China international pipe exhibition will be held soon

After 16 years of accumulation, Tube China China international pipe exhibition has grown into the most influential industry gathering in Asia and the second largest in the world, which will be held on September 26-29, 2018. Dusseldorf exhibition (Shanghai) co., LTD will continue to join hands with metallurgy industry international exchange and cooperation center of metallurgy industry branch of China council for the promotion of international trade to provide you with the "gluttonous feast" of the industry.

The main exhibits of this exhibition are raw materials, pipe and fittings, pipe manufacturing equipment, transformation and recovery equipment, processing tools and auxiliary equipment, pipe and oil special pipe, measurement and control technology, detection technology, professional field, pipe trade service, profile and machinery, etc.

The exhibition will be drawn to the various industries except pipe industry, such as: iron and steel and non-ferrous metal industry, automobile industry, petroleum, natural gas industry, chemical industry, building industry, aerospace engineering, electrical electrical industry, electronic industry, energy industry and even related association/scientific research institutions, colleges and universities, the related trade in services of all kinds of audience.

At that time, cangzhou weihao pipeline technology co., LTD will attend the exhibition (e1-d50) to show our most professional technology and the most innovative products to the audience. We also have professional sales staff in the booth to answer your professional questions, welcome colleagues from all walks of life to visit!

 

Contact:

Address: room 302, unit 3, building 4, zone 6, zifang yuan, fengtai district, Beijing

Tel: 010-67904626

Factory address: south of zhenggang road, xingma village, yanshan county, cangzhou city, hebei province

Tel: 0317-6392673

Fax: 0317-6392671

E-mail: sales@whsteelfittings.com

Web: http://www.whsteelfittings.com

Why does stainless steel rust?

People generally think stainless steel is not rusting, rusting is not stainless steel. In fact, this is a one-sided misunderstanding of stainless steel. Stainless steel will rust under certain conditions.

Stainless steels have the ability to resist oxidation in the atmosphere -- not to rust, but also to corrode in the medium containing acid, alkali and salt -- corrosion resistance. However, the corrosion resistance of the steel varies with the chemical composition of the steel, the state of adding, the conditions of use and the types of environmental media.

For example, 304 steel pipes, in the dry and clean atmosphere, have absolutely excellent anti-rust ability, but move it to the coastal area, in the sea fog with a lot of salt, it will soon rust. The 316 steel pipe performs well in this environment. Therefore, not any kind of stainless steel, in any environment can be resistant to corrosion, rust.

Stainless steel is formed by its surface of a very thin and strong and fine stable chrome oxide film (protective film), to prevent oxygen atoms continue to infiltrate, continue to oxidize, and obtain the ability to resist rust. If, for some reason, the film is constantly damaged, oxygen atoms in the air or liquid infiltrate or iron atoms in the metal are constantly separated to form loose iron oxide and the metal surface is constantly corroded.

This kind of surface film is damaged in many forms, which are commonly seen in daily life:

1. There are particles of dust or other metal particles on the surface of Seamless Steel Reducer. In humid air, the condensed water between the particles and stainless steel connects them into a micro battery, causing an electrochemical reaction.

2. The stainless steel surface adheres to organic juice (such as melon, noodle soup, sputum, etc.), which constitutes organic acid in the presence of water and oxygen, and corrodes the metal surface with organic acid for a long time.

3. The adhesion of stainless steel surface contains acid, alkali and salt substances (such as alkaline water and limestone water spatter in the decoration wall), causing local corrosion.

4. In the polluted air (such as the atmosphere containing a large amount of sulfide, carbon dioxide and nitrogen oxide), the condensed water will form sulfuric acid, nitric acid and acetic acid liquid points, causing chemical corrosion.

To ensure that the metal surface is permanently shiny and not corroded, we should:

1) the surface of decorative stainless steel must be cleaned and scrubbed frequently to remove the attachments and eliminate external factors causing rust.

2) select stainless steel materials that conform to the surrounding environment; Materials such as 316 are resistant to seawater corrosion.

3) some of the chemical components of stainless steel tubes in the market do not meet the corresponding national standards and do not meet the material requirements. This requires careful selection of products from reputable Stainless Steel Stub End Suppliers.

Welding Questions And Answers

1. For galvanizing pipe welding, which welding machine and welding rod are better? 

Dc welding machine, ordinary welding rod.

Welding galvanized steel pipe, using the general welding rod of arc welding machine, as long as there is no slag, false welding, full weld, through pressure test without leakage is qualified. More or less. It's impossible to think without white smoke. It also has something to do with welding rods.

2. How to weld the galvanized pipe with water in the pipe by alternating current? 

If it is the hole in the pipe, it needs to use the grinding wheel to remove the galvanizing layer and then use the welding machine. The welding takes 2 seconds, 6 seconds, 2 seconds and 6 seconds. Until it stops leaking. If you have an air compressor, attach a nozzle to the leaking hole, and the compressed air can push the water back up, welding will be easy. Weld to watertight, polish, then weld, polish, then paint.

3. Is ordinary welding rod good to be soldered for galvanized pipe of inverter dc welding machine?

Very good! You can't find me.

4. Electric welding or argon arc welding is good for galvanizing. 

It is difficult to weld by electric welding or argon arc welding.

5. How to weld the leaking galvanized pipe with ordinary welding?

Same as usual, but with a little more current.

6. Welding galvanized pipe with J422? 

Burning loss occurs in the process of galvanizing pipe welding, and inclusion and porosity are easily produced during electric welding. It is recommended to use weodin 204SI silicon bronze welding wire, which can maximize the control of zinc burning loss and smoke generation. MAG welding method, mixed gas protection or pure argon protection can be adopted.

This problem can occur in welding of galvanized things. There are two solutions: two or more times for each welding line, and the welding current is relatively large at the first time. The galvanized end needs to be soldered off before welding.

7. How much current is suitable for the welding of 3mm galvanized pipe by huayilong second protection welder?

This, it is strongly recommended that you use the minimum current, and the voltage is slightly higher than the conventional adaptive current welding. 3 mm thin plate is very good actually welding, if galvanization, increased certain difficulty, iron water is not necessarily complete fuse component, also can cause the circumstance of partial arc. So I suggest you have a slightly higher voltage. At the same time, it is best to turn off the secondary welding. The key to welding technology is the welder's reason.

8. How to weld galvanized pipes and iron pipes by electric welding?

There is nothing special about soldering in this way, the galvanized pipe is generally thinner. Be careful to wear it. Otherwise, the current needs to be too large to burn through the galvanized tube.

9. What is the harm to people caused by white smoke generated by electric welding of galvanized pipe?

There is great harm, the white smoke is the vaporization phenomenon of trace heavy metal in passivation film after galvanizing. Inhaling human body can affect the blood and central nerve in the body, and also stimulate the throat, nose and lungs. So don't forget to wear a gas mask!

We produce Galvanized Socket Elbow and Welded Flange Tee, If you want to know more about our message, please visit http://www.whsteelfittings.com/

What interfaces are PE, PBE, TOE, TBE, NPT, SW, etc.?

PE=Plain end 

BE=Beveled end

BW=Butt welding

SW=Socket welding

NPT=National pipe thread

PBE=Plain both ends

PLE=Plain large end=

PSE=Plain small end

POE=Plain one end

TOE=Thread one end

TBE=Thread both ends

TLE=Thread large end

TSE=Thread small end

BBE=Bevel both ends

BLE=Bevel large end

BSE=Bevel small end

We are Stainless Steel Stub End Exporter and Stainless Steel Stub End Suppliers, if you want know more, please contact us.

Effect of solid solution on stainless steel pipe fittings and flanges

Rust steel pipe and flange production enterprises, to consider the fitting production cost, but should consider more factors to prevent the corrosion and improve the quality of products, therefore, stainless steel pipe flange production process adopts the solution process, enhance the pipe security is very necessary, heat treatment process on pipe quality and safety plays an important role. It is known that there are a few enterprises in the production of pipe fittings, in order to save costs, do not take solid solution treatment, only use the method of polishing sandblasting treatment, covered up the defects and shortcomings of pipe fittings, which will bring permanent hidden trouble to the use of pipe fittings.

Austenitic stainless steel with heat treatment to soften, the stainless steel is heated to a temperature of about 950 ~ 1150 ℃, the heat preservation time, make the carbide and various alloy elements evenly dissolved in austenite, called solid solution treatment.

The effect of heat treatment on stainless steel pipe fittings

he metal molecular structure, magnetic properties and physical properties of stainless steel pipe fittings changed after forming and welding. The corrosion resistance of the stainless steel can be restored through the atmosphere protection solid solution process, and the required hardness of the stainless steel can be obtained to ensure the best performance of the stainless steel. Stainless steel pipe fittings after solid solution treatment have a good improvement effect:

1. Eliminate the modification phenomenon of stainless steel pipe fittings during processing, reduce the hardness of stainless steel below 220HV, improve the plasticity and toughness of stainless steel, and make pipe fittings more convenient and safe in installation.

2. Restore the stress and intercrystalline changes in the production process of stainless steel pipe fittings, reduce intercrystalline corrosion and stress corrosion of stainless steel pipes, and enhance corrosion resistance.

3. Remove the magnetism of stainless steel caused by the processing process and stabilize the austenite structure.

4. Restore the natural brightness of stainless steel material surface (the natural brightness is different from that of polishing).

Characteristics of solid solution of stainless steel pipe fittings：

Stainless steel is a special kind of steel. Due to the presence of alloying elements such as nickel and chromium, its heat treatment is different from that of ordinary steel.

1.The thermal conductivity of stainless steel is low, which is only 27% of carbon steel at room temperature. With the increase of heating temperature, the thermal conductivity of stainless steel decreases gradually. Therefore, when stainless steel is heated at low temperature, the heating process should be carried out slowly.

2, austenitic stainless steel after solid solution heated to 1100 ℃, can inhibit the production of carbide, and then rapidly cooling to room temperature, carbon supersaturation state, can greatly improve the corrosion resistance of stainless steel.

3. The pipe fittings are protected by (hydrogen) gas in the process of solid solution to avoid the formation of sticky ferric oxide on the stainless steel surface, restore the brightness of the stainless steel surface, and improve the appearance reputation.

Three elements of solid solution of stainless steel pipe fittings：

The advantages and disadvantages of stainless steel pipe fitting solid solution technology have great influence on the corrosion resistance and appearance brightness of stainless steel, and play a decisive role in the processing performance of stainless steel. Therefore, the heat treatment process of stainless steel is very important in the production of stainless steel pipe fittings.

1. Solid solution temperature. According to the characteristics of the chemical composition of stainless steel, the solid solution temperature of stainless steel should be between 950 and 1150 degrees Celsius, so as to achieve the softening effect, so that the hardness of stainless steel can be reduced to 220HV, and meet the quality requirements of piping installation clamping. If the temperature control is not reasonable, various quality defects are likely to occur.

2. Solid solution time. The residual ferrite content in austenitic stainless steel decreases with the increase of heating time. Therefore, stainless steel pipe fittings solid solution treatment should be controlled at about 1050 ℃, the carbon saturated state, improve the corrosion resistance. It is then cooled rapidly in the air to achieve a solid solution effect.

3. Solid solution speed and heat preservation. The thermal conductivity of stainless steel is low, and it is only 27% of carbon steel at room temperature. Therefore, the heating process of stainless steel at low temperature should be carried out slowly. If the heating speed is too fast and deformation is easy to occur, the heating speed of stainless steel should be controlled in solid solution, and the heat preservation time should be paid attention to. Such as 316 l steel at 1100 ℃, holding time is long, the residual content of ferrite is reduced.In our solid solution production, the solid solution of stainless steel pipe fittings should go through the process of heating, heat preservation and time cooling. The whole process takes about 40 minutes.

We produce Stainless Steel Bend and Stainless Steel Elbow, if you want know more,contact us!

Disadvantages of Carbon Steel

Carbon Steel Reducer is acceptable for mechanical engineering and general purpose fabrication. Its strength makes it a great selection of material for the building of cages, frames, fencing and also in other programs in which it will not be exposed to high stress. Because of this, it's preferred for making garden and home products that require low-stress.

Treating mild steel through heat mechanism can impact the carbon material. Normally, heat treatment is used to modify the features of steel. But once initially fabricated in the mill and chilled off there are no substantial changes after heat treatment.

These are a few of the benefits and drawbacks which affect the usage of carbon steel. As every coin has two sides, therefore does moderate steel. For one to make your job work great, you just have to ensure that manufacture is done by a reliable Carbon Steel Reducer Manufacturer. Endless customization, accurate manufacture, persuasive services, hassle-free delivery, and satisfaction are the perks you get by ordering it .