ASTM A671 EFW welded carbon steel pipe is a carbon structural steel pipe manufactured using the electrofusion welding process. This kind of steel pipe is mainly used in high-temperature and high-pressure transportation systems, such as boilers, petrochemicals, thermal pipe networks and other fields.
ASTM A671 electrofusion welded straight seam steel pipe is a steel pipe for normal and low temperature use. There are multiple brands and grades below. The grades are: CA55, CB60, CB65, CB70, CC60, CC65, CC70, CD70, CD80, CFA65, CFB70 , CFE70, CFD65, CH100, CJA115, CJB115, CJE115, CJF115, CJH115, CJP115, the levels are CL10, CL11, CL12, CL13, CL20, CL21, CL22, CL23, CL30, CL31, CL32, CL33, CL40 respectively.
O.D:18"-56"(457.2-1422mm)
W.T:0.312"-2"(7.92-50.8mm)
Unit Length:5-12.3 meter
Application:It is mainly used for oil and gas transportation pipelines.
Packaging:Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
Transportation:By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load)
ASTM A671 Carbon Steel EFW Pipe
Chemical Composition of A671 Pipes
| Steel grade | C max | Si | Mn | P | S |
| A45 | 0.17 | / | 0.98 | 0.035 | 0.035 |
| A50 | 0.22 | / | |||
| CA55/A55 | 0.28 | / | |||
| B55 | 0.20 | 0.13~0.45 | |||
| CB60/B60 | 0.24 | ||||
| CB65/B65 | 0.28 | ||||
| CB70/C70 | 0.31 | 1.30 | |||
| C55 | 0.18 | 0.55-0.98 | |||
| CC60/C60 | 0.21 | ||||
| CC65/C65 | 0.24 | 0.79-1.30 | |||
| CC70/C70 | 0.27 |
Mechanical Properties of A671 Pipe
| Steel Grade | Yield point (N/mm2) max | Tensile Stregth (N/mm2)max | Elongation (%) |
| A45 | 165 | 310~450 | 30 |
| A50 | 185 | 345~485 | 28 |
| A50 | 185 | 345~485 | 28 |
| CA55/A55 | 205 | 380~515 | 27 |
| B55 | 205 | 380~515 | 27 |
| CB60/B60 | 220 | 415~550 | 25 |
| CB65/B65 | 240 | 450~585 | 23 |
| CB70/B70 | 260 | 485~620 | 21 |
| C55 | 205 | 380~515 | 27 |
| CC60/C60 | 220 | 415~550 | 25 |
| CC65/C65 | 240 | 450~585 | 23 |
| CC70/C70 | 260 | 485~620 | 21 |
GNEE company exports to 32 countries and regions around the world, and has more than 200 production employees in the factory. There are more than 200 foreign trade export teams, 11 purchasing personnel, and 20 professional after-sales service teams. Annual export volume is US$500 million.
