90 DEG 4D Bend API A53B

Long radius elbow refers to the pipe outer diameter with radius of curvature equal to 1.5 times, i.e R = 1.5D. Most elbows are available in short radius or long radius variants. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow.

Clean the steel pipe elbow body and wrap the polyethylene tape on it with adhesive. Usually the thickness of coating is 2mm. They are used in the underground pipeline system. Long radius elbow refers to the pipe outer diameter with radius of curvature equal to 1.5 times, i.e R = 1.5D.

ASME B16.9 BW tee is a butt welded pipe fitting according to American Standard.Carbon steel fittings are used in many applications because of its great excellent functions.Pipe tees can be equal tee and reducing tee.These tees have same functions,the only difference is reducing tee can reduce the flow in piping system.

Concentric reducer is used to join pipe sections or tube sections on the same axis. It is cone-shaped, and is used when there is a shift in diameter between pipes. A pipe reducer is available in various specifications, such as a single diameter change and also in a multiple diameter change.

Classify,specification of a BW 90 degree elbow

Carbon steel butt welded 90° elbows are belong to ASTM A234 WPB pipe fittingsBW 90 deg elbows could be made in two types:LR (Long Radius) and SR (Short Radius).The angle of pipe elbows are 45deg and 90 deg.Only 90 deg elbows have LR.

The pipes cannot appreciate because of what the external arrangement of the pipe reducer seems but the flow of the pipe is changed by the internal width conical transition arrangement.

It is used for main pipe string accessories, solvent welding accessories, side outlet and conflicting soluble welding accessories. Such fittings are important because they meet two needs, that is, to connect or separate liquid streams. They are widely used in positive and vacuum applications.

Carbon steel pipe fittings are used in many applications because of its great excellent functions.Carbon steel pipe fittings can manufactured as THD (threaded) fittings,SW (socket weld) fittings and (BW) butt welded fittings.The specifications are in the content below.

Stainless elbow is a popular used type of elbow becase the stainless steel has excellent an-ti corrosive function.Shanghai Zhucheng is an excellent butt welded fittings factory who supplys high quality pipe fittings and flanges for years.

SSAW steel pipe in the production process, we need to pay attention to a series of matters. Except for the following test items, according to the API standard and other relevant standards and the special requirements of some users, but also the need for steel, steel pipe and other tests Destructive tests, including physical and chemical properties of the raw materials into the plant sampling, visual inspection of 100% steel .

90 degree steel pipe elbow functioned to change fluid direction by 90 degree, so also named as vertical elbow. A 90 degree elbow attaches readily to plastic, copper, cast iron, steel and lead. It can also attach to rubber with stainless steel clamps. Available in many materials like silicon, rubber compounds, galvanized steel etc.

Stainless steel BW tees are always used in many corrosive environments because of the corrosion resistance of stainless steel.ASTM A182 F316 is a commonly used grade for stainless steel.Stainless steel pipe fittings are popular because of the an-ti corrosive function.Stainless steel pipe fittings can used over 50 years.

BW 90 elbow is the most used degree,there is also 45 deg elbow to choose.These elbows have similar functions,the only difference is the 90 degree elbow can changes the direction in 90 deg while the 45 degree elbow can changes in 45deg.ASME B16.9 is American Standard of butt welded fittings.

Concentric reducer is used to join pipe sections or tube sections on the same axis. It is cone-shaped, and is used when there is a shift in diameter between pipes. 

Buttwelding Fittings Specification
Shape: Elbow, Tee, Cross, Bend, Reducer, Cap, Stub End
Size Range: 1/2″ – 80″ / DN15 – 2000
Thickness Schedule: SCH 10,SCH 10S, SCH 20, SCH 40,SCH 40S, STD, XS,SCH 80, SCH 80S, SCH 100, SCH 120, SCH 160, XXS

Carbon Steel: Q235, 20#, 35#, 45#, 20G,ASTM A234 WPB/WPC
Low Temp Carbon Steel: Q345B, 16Mn, ASTM A420 WPL6
Pipeline Steel: ASTM A860 WPHY 42 / 46 / 56 / 60 / 65
Alloy Steel: ASTM A234 WP11 / WP12 / WP 5 / WP9 / WP91 / WP92,15CrMoG, 12Cr1MoVG, 12Cr5Mo, 1Cr5Mo, Cr9Mo, 10CrMo910, 12CrMo4-5
Stainless Steel: ASTM A403 WP304/304L/304H, 316/316L, 310S, 321, 317,347,904L
Duplex Stainless Steel: ASTM A815 S32205, S31803, 32750, 32760

A234 WPB BW reducer has the most wide ragnge of applications in all types of butt welded reducer, because A234 WPB is the most used grade in carbon steel.Carbon steel pipe fittings are accepted in many projects because these fittings have great functions and reasonable price.

BW equal tees are the most used tees in the all types of tees.There are equal tee and reducing tee.Galvanized carbon steel pipe fittings have better corrosion resistance than carbon steel fittings.

A182 F316 reducer is a stainless steel butt welded fitting which can used in some corrosive environments because of the high corrosion resistance of stainless steel.BW reducers can be concentric (COC) reducer and eccentric (ECC) reducer.There are many differences between the two types of reducers,you could find the summary “Concentric VS Eccentric” in the content below.

Concentric BW reducer is one type of butt welded fittings.BW reducers can be concentric (COC) reducer and eccentric (ECC) reducer.These reducers have same functions,the only difference is the internal structure.

Stainless steel pipe fittings including Tee,Cross, Elbow, Reducer, Coupling, Nipple, Plug & Cap,Union.They can be connected with pipes by welding, socket and thread.

Steel pipe bend two pipes into a certain angle and connects them together to change the direction of the pipe. it could be bend directly from a finished pipe with cold bending processes, to different degrees.

Concentric (COC) reducer is one type of BW reducer.The other type of reducer is Eccentric (ECC) Reducer.The different of COC Reducer and ECC Reducer is the internal structure.BW pipe fittings are popular because of the strong and permanent connection.