Carbon Steel Pipe Carbon Steel — Factory Direct Supplier

Huaxia-Steel supplies carbon steel pipe for structural, mechanical, pressure and fluid transport applications. Our product range includes seamless carbon steel pipe, ERW pipe and hot-rolled welded pipe in round, square and rectangular sections. We source from certified Chinese mills and deliver with full mill test certificates, dimensional reports and export packing.

Product Specifications

Parameter	Range
Outer diameter	10 mm – 1,000 mm
Wall thickness	1.0 mm – 80 mm
Length	5.8 m, 6 m, 11.8 m, 12 m or custom
Tolerance	ASTM A53 / DIN 2391 / GB/T 8162
Surface	Black, oiled, galvanized, pickled

Available Steel Grades

ASTM A53 Grade B, ASTM A106 Grade B, ASTM A333 Grade 6
API 5L Grade B / X42 / X52 / X65
JIS G3454 STPG370, JIS G3455 STS370
DIN 2391 ST35, ST37, ST44, ST52
GB/T 8162 10#, 20#, 45#, Q345B

Manufacturing Standards

Our carbon steel pipe is manufactured and inspected according to ASTM A53, ASTM A106, ASTM A333, API 5L, JIS G3454, DIN 2391, EN 10210, EN 10219 and GB/T standards. Third-party inspection by SGS, BV, TUV or DNV can be arranged on request.

Applications

Fluid and gas transmission pipelines
Mechanical and structural frameworks
Boiler and pressure equipment
Oil and gas casing and tubing
Construction piling and scaffolding

Quality Assurance

Each batch is tested for chemical composition, tensile strength, yield strength, elongation, flattening, hydrostatic pressure and dimensional accuracy. Mill test certificates include heat number, chemical analysis and mechanical test results. We support pre-shipment inspection and laboratory re-testing.

Packing and Shipping

Pipes are bundled with steel straps, capped at both ends, and wrapped with waterproof plastic film. Wooden crating or hexagonal bundling is available for precision tubes and sea-worthy export. Marking includes grade, standard, heat number, size and bundle number.