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. |
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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
