ASTM A691 Alloy Steel EFW Pipe

Introduction

ASTM A691 is a specification for electric fusion welded steel pipe, primarily used for high pressure and high temperature service. It is made from pressure vessel quality steel plate and is widely used for the applications requiring robust and reliable pipe systems. ASTM A691 EFW pipes are designed to withstand the demands of high pressure and high temperature environments, making them suitable for critical industrial applications. ASTM A691 EFW pipe is made by electric fusion welding process, which involves using filler metal and applying high voltage electricity to fuse the pipe sections for together. Electric fusion welding process is suitable for production of large diameter steel pipes, which can meet different different application needs. We can provide large diameter EFW pipes, the diameter ranging from 406.4mm through 1422mm.

 

Specifications

Product name	ASTM A691 Alloy Steel EFW Pipe
Place of origin	China
Standard	ASTM A691
Grades	1-1/4CR, 2-1/4CR, 5CR
Class	CL 10, CL 11, CL 12, CL 13, CL 20, CL22, etc.
Outside diameter	406.4mm-1422mm
Wall thickness	SCH10, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH100, SCH120, SCH140, SCH160, XXS
Length	3m-12m or customized length
Pipe ends	Plain ends, Bevel ends

 

Chemical compositions %

Steel grades	C	Mn	P,max	S,max	Si	Cr	Mo
1-1/4CR	0.05-0.17	0.40-0.65	0.025	0.025	0.50-0.80	1.00-1.50	0.45-0.65
2-1/4CR	0.05-0.15	0.30-0.60	0.025	0.025	0.50,max	2.00-2.50	0.90-1.10
5CR	0.15,max	0.30-0.60	0.025	0.025	0.50,max	4.00-6.00	0.45-0.65

 

Mechanical properties

Steel grade	Tensile strength(Mpa)	Yield strength,min(Mpa)	Elongation,min(%)
1-1/4CR	415-585	240	22
2-1/4CR, 5CR	415-585	205	18

 

Product show

Large diameter EFW steel pipe can be offered by us. The pipe ends can be provided according to clients' requirements, such as plain ends and bevel ends, etc.

 

Applications

ASTM A691 is particularly suitable for transportation pipelines in sulfur-containing oil and gas fields, and can effectively resist hydrogen sulfide corrosion; Secondly, it is also used for process pipelines in refining and chemical plants, such as inlet and outlet pipelines of hydrogenation reactors, high-temperature heat exchanger bundles, etc; Furthermore, there are high-temperature and high-pressure steam pipelines in the power plants, as well as auxiliary system pipelines in nuclear power plants.

 

FAQ

Q: Are you a manufacturer or supplier?

A: We are a supplier, and we are specializing in steel tubes for many years. Our company is located in Tianjin, and is close to the Tianjin Port. So convenient for loading and transportation.

Q: What is your payment terms?

A: One is 100% T/T, and another one is 30% prepay and the balance payment before shipment or against copy of BL.

Q: How is the quality of your products?

A: Our products are manufactured strictly according to production standard, and each one is carefully inspected before delivery. You don't need to worry about the quality of our products.

Q: Can you accept the small order?

A: Of course, small order and trial order can be accepted by us.

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