Structural Steel Pipe

Product Introduction

Structural steel tubes are hot rolled seamless steel tubes and welded steel tubes. Seamless steel tubes for structure are divided into hot rolled and cold drawn types according to GB/T8162-2008. The outer diameter of hot-rolled steel pipe is 32-630mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-drawn steel tube is 5-200mm, and the wall thickness is 2.5-12mm. Welded steel pipe is made of steel plate or strip after crimping forming. Straight welded steel tubes shall have an outside diameter of 5-508mm and a wall thickness of 0.5-12.7mm, and shall comply with the provisions of GB/T3793-2008. The welded steel pipe used for low-pressure fluid transportation is also called general welded pipe, commonly known as black pipe. The specifications are expressed in millimeters of nominal caliber, which shall comply with the provisions of GB/T3091-2008.

Main grades of the Structural Steel Pipe

Standard	Grade
ASTM A53	GR.A	GR.B
ASTM A106	GR.A	GR.B	GR.C
GB/T 8162	10#	20#	35#	45#	Q345A
	20Cr	40Cr	20Mn2	45Mn2	40CrB
	42CrMo	Q345D	Q345E	20CrMo	35CrMo
	Q345B	27SiMn	A345C	15CrMo
ASTM A519	1020	1035	1045	4130	4140
DIN1629	St37.0	St44.0	St55	St52.0
DIN17175	St35.8	17Mn4	13CrMo44
EN10297	E355	C45	34CrMo4
JIS G3441	SCM 420TK	SCM440TK
JIS G3445	STKM13A	STKM19A

Seamless steel tubes are mainly used for general structure and mechanical processing.

Our Factory & Workshop[email protected]

2500mm Steel Plates Production Line

3500mm Steel Plates Production Line

4500mm Steel Plates Production Line

Spiral Welded Pipe Production Line

1700mm Hot Rolled Coil Production Line

Deep Processing Center

R & D and Testing Center[email protected]

Technical department

Quality Control Department

100% UT test

50000J DWT TEST

Impact test

Mechanins Lab

Metallurgical Microscope

OES Chemical analysis

X-ray test

Vickers hardness tester

About Us

We are a leading private steel company manufacturer. Our company has passed ISO9001 certifica-tion SGS certification and CE certification. Our company covers an area of 100,000 square meters,a con-struction area of 40,000 square meters, We speclize in steel plates for many years. steel plates have versatile applications in different industries. Its durable property makes it ideal for various manufacturing parts. Apart from carbon steel plate, there are vessel steel plate, shipbuilding or construction steel plate, structural steel plate, wear resistant steel plates, stainless steel plate, seamless steel pipes, Structure Steel Pipe, Boiler Steel Pipe, Tubing and Casing, Line Pipe, Coating pipe and etc.

Supplying the best quality goods to the world is our mission, to fulfill this mission, we formed a professional inspection team and an elite sales team. Till now, We have served for more than 100 countries. and established our own Machining processing center in order to meet customer's diverse requirements.

Learn More

20 +Years

Production experience
3500 +

Sucessfull Projects
6000 +

Satisfied Clients

Quantity(Metric Tons)	1 - 10	10 - 50	>50
Est. Time(days)	5	10	Negotiable