ASTM A234 WPB Carbon Steel Seamless Fittings Elbow Rust Proof Black Oil Surface
ASTM A234 WPB Carbon Steel Seamless Fittings Elbow Rust Proof Black Oil Surface
ASTM A234 (ASME SA234) is standard specification of carbon and alloy steel pipe fittings for moderate and high temperature services. Common use material are ASTM A234 Grade WPB, WPC, WP5, WP9, WP11, WP22 and WP91. It covers the butt-welded pipe fittings of Elbow, Tee, Reducer, Cap and Cross, and some socket welding, threaded pipe fittings.
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Grades in Carbon Steel: ASTM A234 Grade WPB, WPC,
Grades in Alloy Steel: ASTM A234 WP1, WP12 CL1/2, WP11 CL1/2/3, WP12 CL1/3, WP5 CL1/3, WP9 CL1/3, WP91 Type 1/2
Outer Diameters: 1/2'' to 48'' in ASME B16.9
Wall Thickness Schedule: SCH 10, SCH 20, SCH 30, SCH 40, SCH STD, SCH 80, SCH XS, SCH120, SCH 160, SCH XXS comply with ASME B36.10
Pressure Class: Class 150, 300, 600, 900, 1500, 2500
Manufacturing Standards: ASME B16.9, ASME B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, MSS-SP-97.
What is the difference of material WP5,WP9,WP11,WP22?
First of all,WP5,WP9,WP11,WP22 are steel grades from standard ASTM A234,
ASTM A234,carbon steel material commonly used in WPB and WPC,alloy materials commonly used WP5/WP9/ WP11/WP12/WP22/WP91 etc.,these materials regardless of the chemical composition,mechanical properties and tensile properties are different.The specific values are as follows:
|
Alloy Steel Pipe Bends ASTM A234 Long Radius Chemical Composition |
|||||||||
|
|
WPB B,C,D,E, |
WPC C,D,E, |
WP11 CL1 |
WP11 CL2, |
WP11 CL3 |
WP22 CL1, |
WP22 CL3 |
WP9 CL1, |
WP9 CL3 |
|
Carbon |
0.3 |
0.35 |
0.05-0.15 |
0.05-0.20 |
0.05-0.20 |
0.05-0.15 |
0.05-0.15 |
0.15 |
0.15 |
|
Manganese |
0.29-1.06 |
0.29-1.06 |
0.30-0.60 |
0.30-0.80 |
0.30-0.80 |
0.30-0.60 |
0.30-0.60 |
0.30-0.60 |
0.30-0.60 |
|
Phosporus |
0.05 |
0.05 |
0.03 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
0.04 |
|
Sulfur |
0.058 |
0.058 |
0.03 |
0.04 |
0.04 |
0.04 |
0.04 |
0.03 |
0.03 |
|
Silicon |
0.10 min |
0.10 min |
0.50-1.00 |
0.50-1.00 |
0.50-1.00 |
0.5 |
0.5 |
0.5 |
0.5 |
|
Chromium |
0.4 |
0.4 |
1.00-1.50 |
1.00-1.50 |
1.00-1.50 |
1.90-2.60 |
1.90-2.60 |
4.0-6.0 |
4.0-6.0 |
|
Molybdenum |
0.15 max |
0.15 max |
0.44-0.65 |
0.44-0.65 |
0.44-0.65 |
0.87-1.13 |
0.87-1.13 |
0.44-0.65 |
0.44-0.65 |
|
Nickel |
0.4 |
0.4 |
… |
… |
… |
… |
… |
… |
… |
|
Copper |
0.4 |
0.4 |
… |
… |
… |
… |
… |
… |
… |
|
Others |
Vanadium 0.08 |
Vanadium 0.08 |
… |
… |
… |
… |
… |
… |
… |
|
|
WP9 CL1, |
WP9 CL3 |
WP91 |
|
Carbon |
0.15 |
0.15 |
0.08-0.12 |
|
Manganese |
0.30-0.60 |
0.30-0.60 |
0.30-0.60 |
|
Phosporus |
0.03 |
0.03 |
0.02 |
|
Sulfur |
0.03 |
0.03 |
0.01 |
|
Silicon |
1 |
1 |
0.20-0.50 |
|
Chromium |
8.0-10.0 |
8.0-10.0 |
8.0-9.5 |
|
Molybdenum |
0.90-1.10 |
0.90-1.10 |
0.85-1.05 |
|
Nickel |
… |
… |
0.4 |
|
Copper |
… |
… |
… |
|
Others |
… |
… |
Vanadium 0.18-0.25 |
|
Alloy Steel Pipe Bends ASTM A234 Long Radius Mechanical Properties |
|||||
|
|
WPB |
WPC, |
WP11-CL1, |
WP11-CL3, |
WP91 |
|
Tensile strength, minimum unless a range is given ksi (MPa) |
60 (415) |
70 (485) |
60 (415) |
75 (520) |
90 (620) |
|
Yield,strength, min ksi (MPa) (0.2% offset or 0.5% extension under-load) |
35 (240) |
40 (275) |
30 (205) |
45 (310) |
60 (415) |
Applications:
Process piping in oil refineries and chemical plants
Oil and gas transmission pipelines; steam systems
Shipbuilding and marine engineering
Marine piping systems, offshore platforms
High-pressure water pipelines in sewage treatment plants and waterworks
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