ASTM A691 EFW Carbon and Alloy Steel Pipe
- Grade: CM-65, CM-70, CMSH-70, CMS-75, CMSH-80, 1/2 CR, 1 CR, 1 1/4 CR, 2 1/4 CR, 3CR, 5CR, 9CR, 91
- OD: 406.4-1524mm WT: 6-50mm L:5.8m/6m/11.8m/12m
ASTM A691 EFW Carbon and Alloy Steel Pipe
ASTM A691 EFW (Electric-Fusion-Welded) Carbon and Alloy Steel Pipes are essential for high-pressure service applications. These pipes are manufactured to meet the rigorous standards of ASTM A691, ensuring exceptional strength, durability, and reliability. Suitable for high-pressure environments, ASTM A691 EFW pipes are widely used in industries such as oil and gas, petrochemical, and power generation. Their robust construction and superior material properties guarantee long-term performance and safety. Choosing ASTM A691 EFW Carbon and Alloy Steel Pipes ensures optimal performance and longevity for your high-pressure piping systems.
Plate Specifications for ASTM A691 EFW Carbon and Alloy Steel Pipe
| Pipe Grade | Type of Steel | ASTM Specification | Number | HB, max |
| CM-65 | carbon-molybdenum steel | A204/A204M | A | 201 |
| CM-70 | carbon-molybdenum steel | A204/A204M | B | 201 |
| CM-75 | carbon-molybdenum steel | A204/A204M | C | 201 |
| CMSH-70 | carbon-manganese-silicon steel, normalized | A537/A537M | 1 | |
| CMS-75 | carbon-manganese-silicon steel | A299/A299M | ||
| CMSH-80 | carbon-manganese-silicon steel, quenched and tempered | A537/A537M | 2 | 201 |
| 1/2 CR | 1/2 % chromium, 1/2 % molybdenum steel | A387/A387M | 2 | 201 |
| 1 CR | 1 % chromium, 1/2 % molybdenum steel | A387/A387M | 12 | 201 |
| 11/4 CR | 11/4 % chromium, 1/2 % molybdenum steel | A387/A387M | 11 | 201 |
| 21/4 CR | 21/4 % chromium, 1 % molybdenum steel | A387/A387M | 22 | 201 |
| 3 CR | 3 % chromium, 1 % molybdenum steel | A387/A387M | 21 | 201 |
| 5 CR | 5 % chromium, 1/2 % molybdenum steel | A387/A387M | 5 | 225 |
| 9 CR | 9 % chromium, 1 % molybdenum steel | A387/A387M | 9 | 241 |
| 91 | 9 % chromium, 1 % molybdenum, vanadium, niobium | A387/A387M | 91 | 241 |
Heat Treatment Parameters for ASTM A691 EFW Carbon and Alloy Steel Pipe
| Pipe Grade | ASTM Specification | Post-Weld Heat-Treat Temperature Range (Stress Relieving), °F (°C) | Normalizing Temperature, max unless otherwise noted, °F (°C) | Quenching Temperature, max unless otherwise noted, °F (°C) | Tempering Temperature, min, °F (°C) |
| CM-65 | A204/A204M | 1100 to 1200 [590 to 650] | 1700 [925] | ||
| CM-70 | A204/A204M | 1100 to 1200 [590 to 650] | 1700 [925] | ||
| CM-75 | A204/A204M | 1100 to 1200 [590 to 650] | 1700 [925] | ||
| CMSH-70 | A537/A537M | 1100 to 1200 [590 to 650] | 1700 [925] | ||
| CMS-75 | A299/A299M | 1100 to 1200 [590 to 650] | 1700 [925] | ||
| CMSH-80 | A537/A537M | 1100 to 1250 [590 to 650] | 1700 [925] | 1100 to 1250 [590 to 675] | |
| ½ CR | A387/A387M | 1100 to 1300 [590 to 705] | 1850 [1010] | 1700 [925] | 1150 to 1375 [620 to 745] |
| 1CR | A387/A387M | 1100 to 1350 [590 to 730] | 1850 [1010] | 1700 [925] | 1150 to 1375 [620 to 745] |
| 1¼ CR | A387/A387M | 1100 to 1375 [590 to 745] | 1850 [1010] | 1700 [925] | 1150 to 1375 [620 to 745] |
| 2¼ CR | A387/A387M | 1100 to 1400 [650 to 760] | 1850 [1010] | 1700 [925] | 1250 to 1400 [675 to 760] |
| 3CR | A387/A387M | 1100 to 1400 [650 to 760] | 1850 [1010] | 1700 [925] | 1250 to 1400 [675 to 760] |
| 5CR | A387/A387M | 1100 to 1400 [705 to 760] | 1850 [1010] | 1650 [900] | 1300 to 1400 [705 to 760] |
| 9CR | A387/A387M | 1200 to 1375 [715 to 745] | … | 1325 to 1375 [715 to 745] | |
| 91 | A387/A387M | 1350 to 1420 [730 to 770] | 1900 to 2000 [1040 to 1095] | 1900 min [1040 min] | 1350 to 1440 [730 to 780] |
Specifications
| Standard | ASTM A691 Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures |
| Steel Grade | CM-65, CM-70, CMSH-70, CMS-75, CMSH-80, 1/2 CR, 1 CR, 1 1/4 CR, 2 1/4 CR, 3CR, 5CR, 9CR, 91 |
| Pipe Size | OD: 406.4-1524mm WT: 6-50mm L:5.8m/6m/11.8m/12m |
| Length | 5.8-16m or OEM |
| End design | 1) Bevel the welding ends to an angle of 30°, +5°, -0°, with a root face of 1/16″, +/- 1/32″. The bevel shall form a V groove with an included angle of 60°+10/-0. The root opening shall be 1/16″, +/- 1/32″ according to ANSI B16.25. 2) Plain or straight ends. 3) Threaded ends with coupling or without coupling according to API Spec. 5B. |
| Packing | Black painted or bare surface, loosely packed |
| Protective Coatings & Linings | 3LPE, 3LPP, FBE, AkzoNobel, HEMPEL, JOTUN, Epoxy Zinc-rich Primer, Liquid Epoxy Resin, etc |
| Section Shape | Round |
| Technique | EFW (Electric-Fusion-Welded) |
| Place of Origin | Made in China |
| MOQ | 25 tons/size |
| Transportation | Land transportation by truck or train, sea transportation by container ship or bulk ship. |
Applications of ASTM A691 EFW Carbon and Alloy Steel Pipe
Petrochemical Industry
Process Piping: Used in the transportation of chemicals, petrochemicals, and other process fluids.
Refineries: Employed in systems that process crude oil and other hydrocarbons.
Power Generation
Boiler Tubes: Utilized in high-pressure and high-temperature environments such as boilers and heat exchangers.
Steam Pipelines: Essential for steam transmission lines in power plants.
Oil and Gas Industry
Pipeline Systems: Used for transporting oil, gas, and natural gas over long distances.
Subsea Pipelines: Suitable for underwater pipeline systems due to their corrosion resistance and strength.
Chemical Processing
Reactor Vessels: Used in chemical reactors and pressure vessels.
Heat Exchangers: Utilized in heat exchanger systems to transfer heat between fluids.
Construction
Structural Applications: Used in the construction of high-strength structures such as bridges, buildings, and industrial frameworks.
Water Treatment Plants
Water Pipelines: Employed in systems for transporting water under high pressure.
Wastewater Systems: Used in sewage and wastewater treatment facilities.
Marine Applications
Shipbuilding: Utilized in the construction of ships and marine vessels due to their strength and corrosion resistance.
Offshore Platforms: Essential for the construction of offshore oil rigs and platforms.
Industrial Applications
Pressure Vessels: Used in various industrial applications requiring high-pressure containment.
Mechanical Components: Employed in the manufacturing of mechanical components that require high strength and durability.
