A671 EFW Steel Pipe Introduction
ASTM A672 carbon steel EFW pipe is produced according to ASTM A672 standard. It is made of carbon steel plate by rolling and welding through electric resistance welding process. It is often used as a pipeline for transporting media such as water, oil, natural gas, and steam.
A671 EFW Steel Pipe Advantages
High Dimensional Accuracy
This carbon steel pipe is manufactured using high-precision rolling equipment to strictly control the outer diameter, wall thickness, and ovality. The outer diameter tolerance is typically within ±0.5%, and the wall thickness tolerance is within ±10%.
Arc Welding Process
The longitudinal welds of ASTM A672 EFW welded carbon steel pipe are welded using arc welding technology. A high-temperature arc melts the weld material, creating a strong fusion between the weld joint and the pipe's metal structure, making the weld less susceptible to cracking.
High Strength
ASTM A672 EFW welded carbon steel pipe is made from heat-treated, high-quality carbon structural steel. Its yield strength reaches over 290 MPa and its tensile strength reaches 415 MPa. It can withstand long-term pressure without deformation or cracking.
A671 EFW Steel Pipe
ASTM A671, Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures. Grades shall designate the type of plate used while class shall designate the type of heat treatment performed during pipe manufacture. Class shall be designated as to whether the weld is radiographically examined, and as to whether the pipe is pressure tested.
Plain Carbon steel grades：CA 55, CB 60,CB 65,CB 70 CC 60,CC 65,CC 70
Nickel steel grades: CF 65,CF 70,CF 65,CF 70
Alloy steel grades:CJA 115, CJB 115,CJE 115,CJF 115,CJH 115,CJP 115
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.
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 |
FAQ
Q: Are custom sizes and lengths available?
A: Fully customizable, including diameter, wall thickness, length, and end treatments (e.g., beveled or flat). We will confirm design drawings with our technical department before ordering, and provide a confirmed sample or technical plan before production.
Q: What payment methods are available?
A: Common payment methods include T/T (telegraphic transfer) and L/C (letter of credit). Payment terms can be negotiated with long-term customers. The specific method can be adjusted flexibly based on the order amount and terms of cooperation.
Q: How is logistics and delivery arranged?
A: We can choose sea, rail, or land transportation according to customer needs. Export orders are typically shipped by ocean container or bulk carrier. We provide full tracking services and assist with relevant export customs clearance procedures.
Q: Does it comply with international standard certification requirements?
A: Our products comply with ASTM A671 standards and can be supplemented with API, ASME, PED, and other certifications upon request to meet engineering specifications in different countries and regions.
Q: What are the packaging options?
A: We can choose packaging options such as anti-rust oil coating, plastic film wrapping, wooden crating, or steel strapping to ensure corrosion, moisture, and impact resistance during transportation.
A671 steel Pipe are Fabricated from Pressure Vessel Plate of Several Analysis and Strength Level for Low Temperature Service. We provide A671 CC60, CC65, CC70 Pipe in Class 22, 32 from 18" to 56" and wall Thickness up to 50 mm.
HAINAN YUAN STEEL PIPE SUPPLY CHAIN CO.,LTD is one of the leading China ASTM A671 EFW Welded Carbon Steel Pipe manufacturers and suppliers, if you want to buy or import best high-quality ASTM A671 EFW Welded Carbon Steel Pipes, feel free to contact us.
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