ASTM A672 EFW Welded Steel Pipes

Introduction

This specification covers electrical-fusion-welded steel pipe for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. An analysis of each mill heat of plate material shall be made, also, an analysis of the finished deposited weld material from each 500 ft or fraction thereof shall be made.

The mechanical test requirements includes one tension test specimen to represent each lot of finished pipe, and one transverse-guided-weld-bend test (two specimens) to represent each lot of finished pipe. Also, radiographic examination shall be made on the full length of each weld.

Specification

Product Details

Chemical Requirements of ASTM A672 :

Specification	Steel grade	Chemical composition						Remarks
Specification	Steel grade	C	Si	Mn	P	S	Ti	Remarks

Pipes for pressure service ASTM A671, A672	-/A45	-/0.17	-	0.98	0.035	0.035	-	A671/ A672
	-/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		0.55 ~0.98
	CC65/C65	0.24		0.79 ~1.30
	CC70/C70	0.27		0.79 ~1.30

Mechanical Properties of ASTM A672:

Products	Steel Grade	BASE METAL MECHANICAL COMPOSITION				Welding point tensile strength (N/mm2)	Remarks
Products	Steel Grade	Yield point (N/mm2)	Tensile Stregth (N/mm2)	Test Pieces	Elongation (%)	Welding point tensile strength (N/mm2)	Remarks
Pipes for pressure service ASTM A671, A672	-/A45	-/165	-/310~450	-	-/30	-/310~450	A671/ A672
	-/A50	-/185	-/345~485		-/28	-/345~485
	CA55/A55	205	380~515		27	380~515
	-/B55	-/205	-/380~515		-/27	-/380~515
	CB60/B60	220	415~550		25	415~550
	CB65/B65	240	450~585		23	450~585
	CB70/B70	260	485~620		21	485~620
	-/C55	-/205	-/380~515		-/27	-/380~515
	CC60/C60	220	415~550		25	415~550
	CC65/C65	240	450~585		23	450~585
	CC70/C70	260	485~620		21	485~620

FAQ

1.Q: Are you a factory or trading company?
A: We are professional manufacturer, and our company also is a very professional a trade company for steel products.We can provide a wide range of steel products.

2.Q:What do your factory do regarding quality control?
A: We have obtained ISO, CE and other certifications. From materials to products, we check every process to maintain good quality.

3.Q: Can I get samples before order ?
A: Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings.

4.Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers benefit ; We respect every customer as our friend and we sincerely do business and make friends with them. No matter where they come from.

5.Q:what is your delivery time ?
A: Our delivery time is about one week, timing according to the number of customers.

Projects

Seamless Pipe Application

Feb 07, 2023

Seamless steel pipes are used in fluid transportation pipes, boiler plants, engineering, and mechanical processing plants.

View More +

Steel Pipe Pile Application

Feb 07, 2023

Steel pipe piles are suitable for foundations in wharf and harbor construction, and their diameters generally range from 400-2000mm, with the most commonly used at 1800mm.

View More +

Carbon Steel Pipe Application

Feb 07, 2023

Carbon steel pipe carbon steel pipe is divided into two categories: hot-rolled and cold-rolled (drawn) steel pipe. The hot-rolled carbon steel pipe is divided into: ordinary steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipe.

View More +

Stainless Steel Pipe Application

Feb 07, 2023

Stainless steel pipe is a kind of hollow long round steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial transmission pipeline and mechanical structure parts, etc., also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture and kitchenware, etc.

View More +

Stainless Steel Pipe Application

Feb 07, 2023

View More +

Square Tube Application

Feb 07, 2023

Rectangular tube is a kind of hollow long steel, also called flat tube, flat square tube or square flat tube (as the name implies). With the same bending and torsional strength, it is lighter in weight, so it is widely used for manufacturing mechanical parts and engineering structures.

View More +

Square Tube Application

Feb 07, 2023

View More +

Welded Pipe Application

Dec 27, 2022

Welded pipes are further divided into general welded pipes, galvanized welded pipes, oxygen blown welded pipes, electric wire casing, metric welded pipes, roller pipes, deep well pump pipes, automotive pipes, transformer pipes, electric welded thin-walled pipes, electric welded shaped pipes and spiral welded pipes according to their applications.

View More +

Aluminum Pipe Application

Feb 07, 2023

Aluminum tubes are widely used in all walks of life, such as: automobiles, ships, aerospace, aviation, electrical appliances, agriculture, electromechanics, home furnishings, etc. Aluminum tubes have been ubiquitous in our lives.

View More +

Welded Pipe Application

Dec 27, 2022

View More +

Introduction to our quality control

Gnee steel group is a supply chain integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing.

Patents

FAQ

We have a certain scale capacity to ensure your order delivery cycle.

Are you a factory or trading company?

We are professional manufacturer, and our company also is a very professional a trade company for steel products. We can provide a wide range of steel products.

Can I get samples before order ?

Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings.

What is our quality inspection standard?

Our key qualities and services comprise of:
• Quality assured goods
• Multiple payment modes
• Experienced crew
• Prompt shipment
• Ethical business policies
• Wide distribution network

Which certifications have we acquired?

GNEE Steel Pipe has the following certification:
• GST CERTIFICATE
• CERTIFICATE OF INCORPORATION
• CERTIFICATE OF IMPORT EXPORT CODE
• ISO CERTIFICATE
• CE CERTIFICATE
• MANUFACTURING CERTIFICATE

Can GNEE Steel Pipe customise the design as per my requirement?

Yes, GNEE Steel Pipe specializes in precisely manufacturing products according to the customers unique needs and requirements.

GNEE Steel Pipe is strategically located to serve the entire country and the whole world’s Alloy Pipe, Low Temperature Pipe, Boiler&Heat exchanger Tube, high-strength structural pipe ,Stainless steel & carbon steel pipes/tubes, and pipe fittings’ requirements.

View More +

Products

Seamless Pipe

Alloy Steel Pipe

Stainless Pipe

API 5L Pipe

Aluminum Pipe

Carbon steel Pipe

Square Tube

API Oil Pipe

Welded Pipe

Steel Pipe Pile