ASTM A671 ELECTRIC FUSION WELDED (EFW) STEEL PIPE FOR ATMOSPHERIC AND LOWER TEMPERATURES

ASTM A671 This specification covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired

 

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We can supply the A671 EFW pipe in the grades and classes listed on the following tables:
ASTM A671 Pipe grades
Pipe grade Steel type ASTM specification
No. Grade/class/type
CA 55 plain carbon A285/A285M Gr C
CB 60 plain carbon, killed A515/A515M Gr 60
CB 65 plain carbon, killed A515/A515M Gr 65
CB 70 plain carbon, killed A515/A515M Gr 70
CC 60 plain carbon, killed, fine grain A516/A516M Gr 60
CC 65 plain carbon, killed, fine grain A516/A516M Gr 65
CC 70 plain carbon, killed, fine grain A516/A516M Gr 70
CD 70 manganese-silicon, normalized A537/A537M Cl 1
CD 80 manganese-silicon, quenched and tempered A537/A537M Cl 2
CFA 65 nickel steel A203/A203M Gr A
CFB 70 nickel steel A203/A203M Gr B
CFD 65 nickel steel A203/A203M Gr D
CFE 70 nickel steel A203/A203M Gr E
CG 100 9% nickel A353/A353M
CH 115 9% nickel A553/A553M Type 1
CJA 115 alloy steel, quenched and tempered A517/A517M Gr A
CJB 115 alloy steel, quenched and tempered A517/A517M Gr B
CJE 115 alloy steel, quenched and tempered A517/A517M Gr E
CJF 115 alloy steel, quenched and tempered A517/A517M Gr F
CJH 115 alloy steel, quenched and tempered A517/A517M Gr H
CJP 115 alloy steel, quenched and tempered A517/A517M Gr P
CK 75 carbon-manganese-silicon A299/A299M Gr A
CP 85 alloy steel, age hardening, quenched and precipitation heat treated A736/A736M Gr A, Class 3
ASTM A671 Pipe classes
Class Heat treatment on pipe Radiography, see note: Pressure test, see note:
10 none none none
11 none 9 none
12 none 9 8.3
13 none none 8.3
20 stress relieved, see 5.3.1 none none
21 stress relieved, see 5.3.1 9 none
22 stress relieved, see 5.3.1 9 8.3
23 stress relieved, see 5.3.1 none 8.3
30 normalized, see 5.3.2 none none
31 normalized, see 5.3.2 9 none
32 normalized, see 5.3.2 9 8.3
33 normalized, see 5.3.2 none 8.3
40 normalized and tempered, see 5.3.3 none none
41 normalized and tempered, see 5.3.3 9 none
42 normalized and tempered, see 5.3.3 9 8.3
43 normalized and tempered, see 5.3.3 none 8.3
50 quenched and tempered, see 5.3.4 none none
51 quenched and tempered, see 5.3.4 9 none
52 quenched and tempered, see 5.3.4 9 8.3
53 quenched and tempered, see 5.3.4 none 8.3
70 quenched and precipitation heat treated none none
71 quenched and precipitation heat treated 9 none
72 quenched and precipitation heat treated 9 8.3
73 quenched and precipitation heat treated none 8.3

5.3.1 – Classes 20, 21, 22 and 23 pipe shall be uniformly heated within the post-weld heat-treatment temperature range indicated in the table below for a minimum of 1 hour per inch (0.4 hr/cm) of thickness or for 1 hour, whichever is greater.

5.3.2 – Classes 30, 31, 32 and 33 pipe shall be uniformly heated to a temperature in the austenitizing range and not exceeding the maximum normalizing temperature indicated in the table below and subsequently cooled in air at room temperature.

5.3.3 – Classes 40, 41, 42 and 43 pipe shall be normalized in accordance with 5.3.2. After normalizing, the pipe shall be reheated to the tempering temperature indicated in the table below as a minimum and held at temperature for a minimum of ½ hour per inch (0.2 hr/cm) of thickness or for ½ hour, whichever is greater, and air cooled.

5.3.4 – Classes 50, 51, 52 and 53 pipe shall be uniformly heated to a temperature in the austenitizing range not exceeding the maximum quenching temperature indicated in table below, and subsequently quenched in water or oil. After quenching, the pipe shall be reheated to the tempering temperature indicated in the table below as a minimum and held at that temperature for a minimum of ½ hour per inch (0.2 hr/cm) of thickness or for ½ hour, whichever is greater, and air cooled.

8.3 – Pressure Test – Classes X2 and X3 pipe shall be tested in accordance with specification A530/A530M, Hydrostatic Test Requirements.

9 – The full length of each weld of Classes X1 and X2 shall be radiographically examined in accordance with and meet the requirements of ASME Boiler and Pressure Vessel Code, Section VIII, Paragraph UW-51. Radiographic examination may be performed prior to heat treatment.

ASTM A671 Pipe Chemical composition

Product analysis of plate: The pipe manufacturer shall make an analysis of each mill heat of plate material. The product analysis shall meet the requirements of the plate specification to which the material was ordered.

Product analysis of weld: The pipe manufacturer shall make an analysis of the finished deposited weld material from each 200 feet or fraction thereof. Analysis shall conform to the welding procedure for deposited weld metal.

Heat treatment
Pipe gradeB ASTM spec & grade/class/type Post-weld heat treat temperature range, °F [°C] Maximum normalizing temperature, °F [°C] Minimum quenching temperature, °F [°C] Tempering temperature, °F [°C] Precipitation heat treat temperature range, °F [°C]
CA 55 A285/A285M (C) 1100-1250 [590-680] 1700 [925]
CB 60 A515/A515M (60) 1100-1250 [590-680] 1750 [950]
CB 65 A515/A515M (65) 1100-1250 [590-680] 1750 [950]
CB 70 A515/A515M (70) 1100-1250 [590-680] 1750 [950]
CC 60 A516/A516M (60) 1100-1200 [590-650]C 1700 [925] 1700 [925] 1100 [590]D
CC 65 A516/A516M (65) 1100-1200 [590-650]C 1700 [925] 1700 [925] 1100 [590]D
CC 70 A516/A516M (70) 1100-1200 [590-650]C 1700 [925] 1700 [925] 1100 [590]D
CD 70 A537/A537M (Cl 1) 1100-1250 [590-680] 1700 [925]
CD 80 A537/A537M (Cl 2) 1100-1250 [590-680]C 1650 [900] 1100 [590]
CFA 65 A203/A203M (A) 1100-1175 [590-635] 1750 [950]
CFB 70 A203/A203M (B) 1100-1175 [590-635] 1750 [950]
CFD 65 A203/A203M (D) 1100-1175 [590-635] 1750 [950]
CFE 70 A203/A203M (E) 1100-1175 [590-635] 1750 [950]
CG 100 A353/A353M 1025-1085 [550-580] 1650 ± 25 [900 ± 15] plus E 1050-1125 [560-605]
CH 100 A553/A553M (Type 1) 1025-1085 [550-580] 1450 ± 25 [790 ± 15] 1475-1700 [800-925] 1050-1175 [560-635]F
CJA 115 A517/A517M (A) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CJB 115 A517/A517M (B) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CJE 115 A517/A517M (E) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CJF 115 A517/A517M (F) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CJH 115 A517/A517M (H) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CJP 115 A517/A517M (P) 1000-1100 [540-590] 1650-1725 [900-940] 1150 [620]
CK 75 A299/A299M (A) 1100-1250 [590-680] 1700 [925]
CP 85 A736/A736M (A, Class 3) 1000-1175 [540-635] 1725 [940] 1000-1225 [540-665]
AWhere ellipses appear in this table, there is no requirement.
BNumbers indicate minimum tensile strength in ksi.
CIn no case shall the post-weld heat treatment temperature exceed the mill tempering temperature.
DTempering range 1100-1300 [590-705], if accelerated cooling utilized per specification A516/A516M.
EIf hot forming is performed after heating to a temperature in a range from 1650-1750 [900-955], the first normalize may be omitted.
FPrior to the tempering treatment, the plates may be subjected to an intermediate heat treatment consisting of heating to a temperature in the range from 1165-1290 [630-700] and either air-cooled or water quenched. See specification A553/A553M for hold times and cooling instructions.
Permissible Variations in Wall Thickness and Weight

Dictated by the requirements of the specification to which the manufacturer ordered the plate.

Permissible Variations in Outside Diameter

Based on circumferential measurement +/-0.5% of the specified outside diameter.

Reference documents

A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A577/A577M Specification for Ultrasonic Angle-Beam Ex­amination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applica­tions
E110 Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers E165/E165M Practice for Liquid Penetrant Examination for General Industry
E709 Guide for Magnetic Particle Testing