Tianjin Tianyingtai Steel Pipe Co., Ltd. is one of the most credible manufacturers and suppliers of erw welded pipe for common construction in China. Welcome to consult the quotation and import cheap erw welded pipe for common construction made in China here from our factory.
1. size
Both of metric standard and British standard are available from us. Normally its size range should be as below,
Diameter of pipe : 1/2" (inch) to 8' (inch)
Wall thickness of pipe: 0.7 to 6.0 (mm)
2.Material Grades
ASTM A53 Grade A / Grade B - Black and hot-dipped galvanized welded steel pipe
ASTM A252 Grade 1/2/3 - Welded and seamless steel pipe piles
API 5L Grade B / X42 / X52 - Line pipe for fluid transportation
GB/T 3091 - Welded steel pipes for low-pressure fluid delivery (Q235, Q345)
EN 10219 S235JR / S275JR / S355JR - Cold-formed welded structural hollow sections
JIS G3444 STK400 / STK500 - Carbon steel tubes for general structural purposes
BS 1387 - Steel tubes for scaffolding and general engineering
3.usage
Wide range of usage about welded steel tubing, for example, all-purpose welded steel pipe used for compressor stations, power plants, refineries, natural gas transportation and steam, vapour transportation. In addition, It is also widely used in manufacturing structural and mechanical spare parts like oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Welded steel tube can improve material utilization, simplify manufacturing process, save steel materials and processing time. It can be finished and processed as welding, bending and flanging.
4.Quality Assurance & Testing
Every ERW pipe undergoes strict quality control to ensure compliance with international standards:
(1)Chemical Composition Analysis
(2)Mechanical Tests: Tensile strength, yield strength, elongation, flattening test, bend test
(3)100% Hydrostatic Test - tested at pressure specified by standard (typically 2.0–7.0 MPa)
(4)Non-Destructive Testing (NDT): Ultrasonic, Eddy Current testing for weld seam integrity
(5)Dimensional & Visual Inspection
(6)Coating Thickness & Adhesion Test (for galvanized pipes)
(7) Mill Test Certificate (MTC): EN 10204 3.1 / 3.2 provided
(8)Third-Party Inspection Available: SGS, BV, TUV, Intertek
5.advantage
for the advantages of welded steel pipe, Compared with solid steels such as round bar steel (steel rod), welded steel tube has lighter weight when its bending and torsional strength keep the same. In addition, it is a kind of steel with economic section. Following concrete advantages,
Welded steel pipes have high accuracy, uniform wall thickness and high brightness of inner and outer surface (Tips: steel pipe surface brightness depends on surface grade of the steel plate.)
Its weight is only 1/5 of square steel because of welded steel tube with lighter weight.
Welded steel pipe has corrosion resistance, acid, alkali, salt and atmospheric environment corrosion resistance, high temperature resistance, good impact resistance and fatigue resistance.
Welded steel pipe has excellent mechanical properties and the machining is more easy.
6.Certification
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