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

American Piping Products stocks A671 EFW pipe in the grades and classes listed on the following tables:

Pipe grades

Pipe gradeSteel typeASTM specification
No.Grade/class/type
CA 55plain carbonA285/A285MGr C
CB 60plain carbon, killedA515/A515MGr 60
CB 65plain carbon, killedA515/A515MGr 65
CB 70plain carbon, killedA515/A515MGr 70
CC 60plain carbon, killed, fine grainA516/A516MGr 60
CC 65plain carbon, killed, fine grainA516/A516MGr 65
CC 70plain carbon, killed, fine grainA516/A516MGr 70
CD 70manganese-silicon, normalizedA537/A537MCl 1
CD 80manganese-silicon, quenched and temperedA537/A537MCl 2
CFA 65nickel steelA203/A203MGr A
CFB 70nickel steelA203/A203MGr B
CFD 65nickel steelA203/A203MGr D
CFE 70nickel steelA203/A203MGr E
CG 1009% nickelA353/A353M
CH 1159% nickelA553/A553MType 1
CJA 115alloy steel, quenched and temperedA517/A517MGr A
CJB 115alloy steel, quenched and temperedA517/A517MGr B
CJE 115alloy steel, quenched and temperedA517/A517MGr E
CJF 115alloy steel, quenched and temperedA517/A517MGr F
CJH 115alloy steel, quenched and temperedA517/A517MGr H
CJP 115alloy steel, quenched and temperedA517/A517MGr P
CK 75carbon-manganese-siliconA299/A299MGr A
CP 85alloy steel, age hardening, quenched and precipitation heat treatedA736/A736MGr A, Class 3

Pipe classes

ClassHeat treatment on pipeRadiography, see note:Pressure test, see note:
10nonenonenone
11none9none
12none98.3
13nonenone8.3
20stress relieved, see 5.3.1nonenone
21stress relieved, see 5.3.19none
22stress relieved, see 5.3.198.3
23stress relieved, see 5.3.1none8.3
30normalized, see 5.3.2nonenone
31normalized, see 5.3.29none
32normalized, see 5.3.298.3
33normalized, see 5.3.2none8.3
40normalized and tempered, see 5.3.3nonenone
41normalized and tempered, see 5.3.39none
42normalized and tempered, see 5.3.398.3
43normalized and tempered, see 5.3.3none8.3
50quenched and tempered, see 5.3.4nonenone
51quenched and tempered, see 5.3.49none
52quenched and tempered, see 5.3.498.3
53quenched and tempered, see 5.3.4none8.3
70quenched and precipitation heat treatednonenone
71quenched and precipitation heat treated9none
72quenched and precipitation heat treated98.3
73quenched and precipitation heat treatednone8.3

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.

Scope

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. The specification nominally covers pipe 16 inches (400 mm) in outside diameter or larger and of ¼ inch (6 mm) wall thickness or greater. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.

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 gradeBASTM spec & grade/class/typePost-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 55A285/A285M (C)1100-1250 [590-680]1700 [925]
CB 60A515/A515M (60)1100-1250 [590-680]1750 [950]
CB 65A515/A515M (65)1100-1250 [590-680]1750 [950]
CB 70A515/A515M (70)1100-1250 [590-680]1750 [950]
CC 60A516/A516M (60)1100-1200 [590-650]C1700 [925]1700 [925]1100 [590]D
CC 65A516/A516M (65)1100-1200 [590-650]C1700 [925]1700 [925]1100 [590]D
CC 70A516/A516M (70)1100-1200 [590-650]C1700 [925]1700 [925]1100 [590]D
CD 70A537/A537M (Cl 1)1100-1250 [590-680]1700 [925]
CD 80A537/A537M (Cl 2)1100-1250 [590-680]C1650 [900]1100 [590]
CFA 65A203/A203M (A)1100-1175 [590-635]1750 [950]
CFB 70A203/A203M (B)1100-1175 [590-635]1750 [950]
CFD 65A203/A203M (D)1100-1175 [590-635]1750 [950]
CFE 70A203/A203M (E)1100-1175 [590-635]1750 [950]
CG 100A353/A353M1025-1085 [550-580]1650 ± 25 [900 ± 15] plus E1050-1125 [560-605]
CH 100A553/A553M (Type 1)1025-1085 [550-580]1450 ± 25 [790 ± 15]1475-1700 [800-925]1050-1175 [560-635]F
CJA 115A517/A517M (A)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CJB 115A517/A517M (B)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CJE 115A517/A517M (E)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CJF 115A517/A517M (F)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CJH 115A517/A517M (H)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CJP 115A517/A517M (P)1000-1100 [550-580]1650-1725 [900-940]1150 [620]
CK 75A299/A299M (A)1100-1250 [590-680]1700 [925]
CP 85A736/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