Welded Carbon Steel Square Pipe

Advanced technology: high-frequency welding (ERW)/submerged arc welding (LSAW)/seamless cold-drawn to ensure precise size and uniform weld seam. Anti-corrosion treatment: hot-dip galvanizing, epoxy coating or spray painting are optional to extend outdoor service life.

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1.Welded Carbon Steel Round Pipe

Parameter	Specification Range	Common Sizes	Standard
OD	10mm-2000mm	21.3mm, 48mm, 114mm	GB/T 3091, ASTM A53
Wall Thickness	0.8mm-20mm	2.0mm, 3.6mm, 6.0mm	EN 10219, JIS G3444
Length	1m-12m(Customisation up to 18m)	6m, 12m
Material	Q195, Q235B, Q345B	ASTM A36, SS400
Process	ERW/LSAW

2.Seamless Carbon Steel Round Pipe

Parameter	Specification Range	Common Sizes	Standard
OD	6mm-800mm	25mm, 60mm, 168mm	GB/T 8163, ASTM A106
Wall Thickness	1mm-50mm	3mm, 8mm, 12mm	DIN 2448, OCTG
Length	3m-12m(Customisation up to 15m)	5.8m, 11.8m
Material	20#, 45#, 16Mn	ASTM A53 Gr.B, ST52

3.Welded Carbon Steel Square Pipe

Parameter	Range	Stock Sizes	Standard	Feature
Side Length	10×10mm - 500×500mm	20×20mm, 50×50mm	GB/T 6728, ASTM A500	ERW,internal and external deburring
Wall Thickness	0.8mm-20mm	1.5mm, 3.0mm	JIS G3463, EN 10219	Flat weld seam, high strength
Length	1m-12m(Customisation )	6m, 12m	----	Flat cut, ±1mm tolerance
Material	Q195/Q235B/Q345B/Q355	ASTM A36, SS400	----	galvanized/painted

Applications

Industry	Applications
Construction	Building frameworks, scaffolding, guardrails, roofing supports.
Oil & Gas	Low-pressure pipelines, casing pipes, water injection lines (OCTG 5L compliant).
Water Supply	Municipal water drainage, fire sprinkler systems, irrigation pipes.
Mechanical	Conveyor rollers, hydraulic cylinders, truck chassis components.
Agriculture	Greenhouse frames, livestock fencing, grain storage bins.

Customisation service
Flexible size: support customized outer diameter (OD 10mm-2000mm), wall thickness (1mm-50mm), length (1m-12m)

Main Products

High Strength Seamless Tubes Excellent Pressure Resistance Stable Mechanical Properties Industrial Application Machinery Engineering Systems Carbon Steel Pipe

FAQ

Q:what this type pipe cost and delivery advantages?
A:Favourable price: large-scale production, 30%-50% lower cost than seamless pipe.

Fast delivery: regular specifications in stock, customised sizes delivered in 7-15 days.

Q:Do you have any certification and quality assurance?
A: International Certification: Passed ISO 9001, CE, OCTG
5L, GB/T 3091 and other standards.

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