ASTM A691 Carbon Alloy Steel Pipe EFW for Pressure Service
ASTM A691 ASME SA691 Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures covers carbon and alloy steel pipe, electric-fusion-welded EFW with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures. Heat treatment may or may not be required to attain the desired mechanical properties. The pipes are classified according to steel grades and are designated in classes according to the type of heat treatment performed in the pipe manufacture, whether the weld is radiographically examined, and whether the pipe has been pressure tested.
The steel welds shall be made either manually or automatically by an electric process involving the deposition of filler metal. The welded joints shall have positive reinforcement at the center of each side of the weld. The contour of this reinforcement shall be smooth, and the deposited metal shall be fused smoothly and uniformly into the plate surface. The joints shall undergo tension, bend and pressure tests. Unacceptable surface imperfections shall be removed by grinding or machining. The depression after grinding or machining shall be blended uniformly into the surrounding surface. Repair of weld and base metal defects shall be done by welding.
1.1 This specification covers carbon and alloy steel pipe, electric-fusion-welded with filler metal added, fabricated from pressure-vessel-quality plate of several analyses and strength levels and suitable for high-pressure service at high temperatures. Heat treatment may or may not be required to attain the desired mechanical properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.
1.2 The specification nominally covers pipe 16 in. [400 mm] in outside diameter and larger with wall thicknesses up to 3 in. [75 mm] inclusive. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.
1.3 Several grades and classes of pipe are provided.
1.3.1 Grade designates the type of plate used as listed in Table 1.
1.3.2 Class designates the type of heat treatment performed in the manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.
Referenced Documents
ASTM Standards
ASTM A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
ASTM A204/A204M Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum
ASTM A299/A299M Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon
ASTM A370 Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A387/A387M Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
ASTM A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
ASTM A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
ASTM A537/A537M Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
ASTM E165 Practice for Liquid Penetrant Examination for General Industry
ASTM E709 Guide for Magnetic Particle Testing
ASME Boiler and Pressure Vessel Code
SectionIX,WeldingQua
Alloy steel pipe--specifications; Carbon steel pipe--specifications; Electric-fusion-welded steel pipe; High-temperature service applications--steel pipe; Pressure vessel steel pipe--specifications; Welded steel pipe--specifications; Alloy steel pipe--specifications; Carbon steel pipe--specifications; Electric-fusion-welded steel pipe; High-temperature service applications--steel pipe; Pressure vessel steel pipe--specifications; Welded steel pipe--specifications;
ICS Code
ICS Number Code 23.040.10 (Iron and steel pipes) |