ASTM A234 Carbon and Alloy Steel Pipe Fittings
Steel pipe fitting are made of carbon or alloy steel pipe, plates, profiles, to a certain shape that could make a function (Change the fluids direction or rate) in pipeline systems. Mostly these fittings includes steel elbow (45 or 90 degree bend), tee, reducer (concentric or eccentric reducer), cross, caps, nipple, flanges, gasket, studs and etc.
For industrial purposes, in pipeline systems usually we need to change the transmission direction; Adjust fluids (oil and gas, water, slurry) flow rate; Open or close the pipelines, etc. So to complete these activities, steel pipe fittings will be applied.
Size : 1/2"NB TO 48"NB IN
Schedule: SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type : Seamless / ERW / Welded / Fabricated
Material Type:
Stainless Steel, Alloy Steel and Carbon Steel
Nickel Alloys
Duplex
Grades:
Nickel Alloy
ASTM / ASME SB 336 UNS 2200 ( NICKEL 200 ), UNS 2201 (NICKEL 201 ), UNS 4400 (MONEL 400 ), UNS 8020 ( ALLOY 20 / 20 CB 3, UNS 8825 INCONEL (825), UNS 6600 (INCONEL 600 ), UNS 6601 ( INCONEL 601 ), UNS 6625 (INCONEL 625), UNS 10276 ( HASTELLOY C 276 )
Stainless Steel
ASTM / ASME SA 403 GR WP "S" / "W" / " WX" 304 , 304L, 304H, 304N, 304LN, 309, 310H, 316, 316H, 317, 317L, 321, 321H, 347, 347 H.
Duplex Steel
ASTM / ASME SA 815 UNS NO.S 31803, S 32205, S 32550, S 32750, S 32760.
Carbon Steel
ASTM / ASME A 234 WPB, WPC
ASTM / ASME A 860 WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Alloy Steel
ASTM / ASME A 234 WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 23, WP 91.
What is ASTM A234 WPB
ASTM A234 is Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types. Steel Pipe fittings are applied in pressure pipelines and in pressure vessel fabrications. These fittings material consist of killed steel, forgings, bars, plates, seamless or HFW (fusion welded) pipe products, with filler metal added.
ASTM A234 includes wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. etc.
As we know, ASTM A234 steel pipe fittings are used in pressure piping and in pressure vessel fabrication, for services at moderate and elevated temperatures. The fittings material in this standard consist of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added.
In this standard it covers the specification of elbows, tees, reducers, caps and cross, it usually adopt butt welding ends.
Mechanical properties of ASTM A234 WPB pipe fittings
Tensile Strength 60,000 pis 415 Mpa
Yield Strength 35,000 psi 240 Mpa
Pressures Ratings: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2000 LBS, 3000 LBS to 9000 LBS.
ASTM A234 Carbon and Alloy Steel Pipe Fittings
POSTED ON 2017-10-30
ASTM A234 standard steel pipe fittings have been widely applied in pipeline systems, it includes carbon and alloy steel material.
What is Steel pipe fittings
Steel pipe fitting are made of carbon or alloy steel pipe, plates, profiles, to a certain shape that could make a function (Change the fluids direction or rate) in pipeline systems. Mostly these fittings includes steel elbow (45 or 90 degree bend), tee, reducer (concentric or eccentric reducer), cross, caps, nipple, flanges, gasket, studs and etc.
For industrial purposes, in pipeline systems usually we need to change the transmission direction; Adjust fluids (oil and gas, water, slurry) flow rate; Open or close the pipelines, etc. So to complete these activities, steel pipe fittings will be applied.
What is ASTM A234 WPB
ASTM A234 is Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types. Steel Pipe fittings are applied in pressure pipelines and in pressure vessel fabrications. These fittings material consist of killed steel, forgings, bars, plates, seamless or HFW (fusion welded) pipe products, with filler metal added.
ASTM A234 includes wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. etc.
As we know, ASTM A234 steel pipe fittings are used in pressure piping and in pressure vessel fabrication, for services at moderate and elevated temperatures. The fittings material in this standard consist of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added.
In this standard it covers the specification of elbows, tees, reducers, caps and cross, it usually adopt butt welding ends.
Grades in ASTM A234
ASTM A234 specification has many grades, such as WPB, WPC, WP5, WP9 WP11, WP12, WP22, WP91 and so on.
In these standard Grade WPB is the most common material used for medium and high temperature pipelines. W means weldable, P means pressure, B is grade b, refer to the minimum yield strength.
The source raw material of ASTM A234 WPB steel pipe fittings may be from steel pipe, such as ASTM A106 Gr.B and C. Also from steel plate, as ASTM A285 Gr.C, ASTM A516 Gr 70, ASTM A572 etc.
ASTM A234 WPB steel pipe fitting chemical and mechanical features
Grade WPB fittings made from the steel pipes or plates maximum C is 0.35%.
Forging fittings Carbon content 0.35% maximum and Silicon content 0.35% maximum, no minimum.
For each reduce of 0.01 of Carbon content, Manganese maximum content increase 0.06%, up to the maximum 1.35% for Mn.
Copper, Nickel, Niobium and Molybdenum sum content shall not exceed 1.00%.
Niobium + Molybdenum shall not exceed 0.32%.
For other grades:
Mechanical properties of ASTM A234 WPB pipe fittings
Tensile Strength 60,000 pis 415 Mpa
Yield Strength 35,000 psi 240 Mpa
Pressures Ratings: 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2000 LBS, 3000 LBS to 9000 LBS.
For other grades in ASTM A234:
ASTM A234 includes seamless and welded pipe fittings
For the seamless steel pipe fittings refers to the fittings raw material from the seamless steel pipes and tubes;
Thus the welded steel pipe fittings covers the fittings raw material from welded steel pipes.
It shall be noted that,
ASTM A234 specification does not cover cast welding fittings or fittings machined from castings.
Steel pipe fittings manufacturing forming processes
The manufacturing processes for pipe fittings includes forging and shaping operations. As well as pressing, hammering, piercing, extruding, upsetting, rolling, bending, fusion welding and machining. Or the processes of combination of two or more of these operations.
During the manufacturing steel pipe fittings, below activities shall be noted:
1, Injurious imperfections, welding defects shall be not created.
2, After shaping or forming the fittings in a suitable temperature, it shall be cooled in a appropriate environments to a temperature that below the critical range. And no defects shall be made during the cooling procedures. The cooling rapid shall be not more than in the air.
3, Suitable inspection shall be performed after manufacturing. (Hydrostatic test, hardness test, tensile test etc)
上一篇：OCTG Tubing, API 5CT Tubing
下一篇：ASTM A234 Carbon Steel Alloy Steel Pipe Fitting
(Tag):