Carbon Steel Welded Steel Pipe Manufacturer

Carbon Steel Welded Steel Pipe

Three welding types: ERW, SSAW spiral, LSAW longitudinal submerged‑arc welded
Comprehensive grades: structural steel & API 5L pipeline steel X42‑X80 series
Ultra‑large diameter availability, cost‑effective for heavy‑diameter engineering
Strict weld inspection, fit for municipal, oil‑gas, piling, offshore and nuclear auxiliary service

Product Overview

Carbon Steel Welded Steel Pipe is a welded pipe solution designed for structural, fluid transportation, and heavy industrial applications. It consists of three main welding processes: ERW (Electric Resistance Welded), SSAW (Spiral Submerged Arc Welded), and LSAW (Longitudinal Submerged Arc Welded), providing diversified solutions for different diameter ranges, pressure requirements, and engineering conditions.

The product covers multiple carbon steel grades including Q195, Q235B, Q355B, ASTM A53 Gr.B, EN S235JR, API 5L pipeline steel grades L245, L290, L360, L415, X42-X80, and other engineering grades. It is manufactured according to international standards such as GB/T3091, GB/T9711, API 5L, ASTM A53, ASTM A252, EN 10219, and EN 10217.

According to different production methods, Carbon Steel Welded Steel Pipe supports a wide range of dimensions. ERW pipes are suitable for smaller and medium diameters, SSAW pipes provide large diameter spiral welded solutions, and LSAW pipes are designed for large-scale oil and gas pipelines, structural columns, offshore projects, and pressure applications.

Before delivery, welded pipes undergo weld seam inspection and hydrostatic testing. Mill Test Certificates are available for each batch, while export packaging is prepared for international transportation, supporting global engineering contractors, pipeline operators, piling fabricators, and energy-sector customers.

Carbon Steel Welded Steel Pipe

Chemical & Mechanical Property Snapshot

Item	ERW Carbon Steel Welded Pipe	SSAW Carbon Steel Welded Pipe	LSAW Carbon Steel Welded Pipe
Material Grades	Q195, Q235B, Q355B, ASTM A53 Gr.B, EN S235JR	Q235B, Q355B, L245, L290, L360, L415, X42–X70	X42, X52, X60, X65, X70, X80, Q355B, P265GH
Carbon Content (C)	≤0.22%	≤0.24%	≤0.26%
Manganese Content (Mn)	0.30–1.40%	0.60–1.60%	0.80–1.70%
Silicon Content (Si)	≤0.35%	≤0.40%	≤0.45%
Sulfur Content (S)	≤0.045%	≤0.035%	≤0.030%
Phosphorus Content (P)	≤0.045%	≤0.035%	≤0.030%
Yield Strength (MPa)	195–355	245–485	290–555
Tensile Strength (MPa)	315–510	415–620	435–655
Elongation	≥20%	≥18%	≥17%
Min. Bend Test / Weld Test	Pass	Pass	Pass
MOQ	5 Metric Tons	10 Metric Tons	10 Metric Tons
Lead Time	15–20 working days	20–25 working days	25–30 working days

Detailed Technical Specifications

Item	Details
Product Name	Carbon Steel Welded Steel Pipe
Welding Types	ERW (Electric Resistance Welded), SSAW (Spiral Submerged Arc Welded), LSAW (Longitudinal Submerged Arc Welded)
ERW Standards	GB/T3091, ASTM A53, EN10219
ERW Grades	Q195, Q235B, Q355B, ASTM A53 Gr.B, EN S235JR
ERW Outer Diameter	12.7 mm–610 mm
ERW Wall Thickness	0.8 mm–20 mm
ERW Length	6 m / 12 m
ERW Applications	Cable conduit sleeves, potable water supply, drainage systems, scaffolding frames, general steel structures, low-pressure fluid conveyance, agricultural greenhouse framework
SSAW Standards	GB/T9711, API 5L PSL1 / PSL2, ASTM A252
SSAW Grades	Q235B, Q355B, L245, L290, L360, L415, X42-X70
SSAW Outer Diameter	219 mm–3620 mm
SSAW Wall Thickness	5 mm–25.4 mm
SSAW Applications	Municipal sewage networks, oil and natural gas transmission, bridge pile foundations, wharf foundation piling, water diversion projects, cofferdam cylinder structures
LSAW Standards	GB/T9711, API 5L, EN10217
LSAW Grades	X42, X52, X60, X65, X70, X80, Q355B, P265GH
LSAW Outer Diameter	406 mm–1626 mm
LSAW Wall Thickness	6 mm–50 mm
LSAW Applications	Oil-gas trunk pipelines, nuclear power circulating water piping, heavy steel structural columns, offshore platform foundation piles, pressure vessel shells
Inspection	Weld seam inspection, hydrostatic test
Documentation	Mill Test Certificate (MTC)
Export Packaging	Seaworthy export packaging
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit
Package	Waterproof paper + galvanized steel strap + seaworthy export wooden pallet

Shape Table

Shape Type	Description	Applicable Pipe Type
Round / Circular Tube	Standard circular cross-section, most widely used	ERW, SSAW, LSAW Carbon Welded Pipe
Straight End	Plain ends, no threading, cut flat	ERW, SSAW, LSAW
Beveled End	30° / 37.5° welding bevel for butt welding	SSAW, LSAW (large-diameter pipeline)
Threaded End	Thread + coupling for connection	Small-size ERW pipe
Grooved End	Groove for mechanical coupling connection	Medium-size ERW pipe for fire & water systems
Cut to Fixed Length	6 m, 12 m, or custom fixed cut length	ERW / SSAW / LSAW

Dimension Table

Pipe Type	Outer Diameter Range	Wall Thickness Range	Standard Length	Tolerance
ERW Welded Pipe	12.7 mm–610 mm	0.8 mm–20 mm	6 m / 12 m	OD ±0.5%, WT ±10%
SSAW Spiral Welded Pipe	219 mm–3620 mm	5 mm–25.4 mm	6 m / 12 m or custom	OD ±1.0%, WT -5% to +12.5%
LSAW Longitudinal Welded Pipe	406 mm–1626 mm	6 mm–50 mm	6 m / 12 m or custom	OD ±0.75%, WT -5% to +10%

Product Comparison Table

Product Type	Manufacturing Process	Main Standards	Material Grades	Size Range	Typical Applications	Selection Advantage
ERW Carbon Steel Welded Pipe	Electric Resistance Welded	GB/T 3091, ASTM A53, EN 10219	Q195, Q235B, Q355B, ASTM A53 Gr.B, EN S235JR	OD 12.7–610 mm, WT 0.8–20 mm, Length 6 m / 12 m	Cable conduit, potable water supply, drainage, scaffolding, greenhouse frame, low-pressure fluid applications	Low cost, fast delivery, stable dimensions for small and medium diameters
SSAW Carbon Steel Welded Pipe	Spiral Submerged Arc Welded	GB/T 9711, API 5L PSL1 / PSL2, ASTM A252	Q235B, Q355B, L245, L290, L360, L415, X42–X70	OD 219–3620 mm, WT 5–25.4 mm	Municipal sewage, oil & gas transmission, bridge piling, wharf foundation, water diversion projects	Ultra-large diameter, economical for long-distance fluid transmission
LSAW Carbon Steel Welded Pipe	Longitudinal Submerged Arc Welded	GB/T 9711, API 5L, EN 10217	X42, X52, X60, X65, X70, X80, Q355B, P265GH	OD 406–1626 mm, WT 6–50 mm	Oil & gas trunk pipelines, nuclear circulating water pipes, offshore foundation piles, pressure vessel shells	High welding quality, excellent pressure resistance, suitable for heavy structural use
Carbon Steel Seamless Steel Pipe	Hot-rolled / Cold-drawn seamless, no weld seam	GB/T 8163, GB/T 699, ASTM A106, ASTM A53, ASTM A333, EN 10216, JIS G3454	10#, 20#, 45#, Q355B, 16Mn, ASTM A106 Gr.B, ASTM A333 Gr.1 / Gr.6	OD 6–720 mm; Wall thickness 1–100 mm	High-pressure fluid transmission, boiler systems, hydraulic equipment, chemical pipelines	No weld seam structure, suitable for high-pressure and high-temperature applications
API Oil / Casing Pipe	Seamless or welded oilfield pipe	API Spec 5CT, API Spec 5B, ISO 11960, GB/T 19830	J55, N80, L80, P110, C90, T95, Q125	Oil tubing and casing sizes according to API specifications	Oil wells, gas wells, drilling operations, well casing systems	Designed specifically for oil and gas exploration and production environments
Stainless Steel Pipe	Seamless or welded stainless steel production	ASTM, EN, JIS standards depending on grade	304, 316, 316L and other stainless grades	Various OD and wall thickness options	Chemical processing, food equipment, sanitary systems, corrosion-resistant pipelines	Superior corrosion resistance for special media environments
Galvanized Steel Pipe	Carbon steel pipe with zinc coating treatment	ASTM, EN, GB standards depending on application	Carbon steel with galvanized coating	Small to medium diameter, commonly used	Construction, water systems, outdoor structures, general fluid applications	Improved corrosion protection for general environments

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Scaffolding materials

Steel Structure Processing

Pressure Vessels Stainless Steel

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is Carbon Steel Welded Steel Pipe?

Carbon Steel Welded Steel Pipe is a welded pipe product manufactured through ERW, SSAW, or LSAW processes for structural, fluid transportation, pipeline, and industrial applications.

What welding methods are available for Carbon Steel Welded Steel Pipe?

The available welding processes include ERW (Electric Resistance Welded), SSAW (Spiral Submerged Arc Welded), and LSAW (Longitudinal Submerged Arc Welded).

What standards can be used for welded steel pipe production?

The product supports GB/T3091, GB/T9711, API 5L, ASTM A53, ASTM A252, EN10219, and EN10217 standards.

What sizes of welded steel pipe can be supplied?

Size ranges depend on the welding process. ERW pipes cover 12.7–610 mm OD, SSAW pipes cover 219–3620 mm OD, and LSAW pipes cover 406–1626 mm OD.

Can Carbon Steel Welded Steel Pipe be supplied for oil and gas projects?

Yes. SSAW and LSAW pipes support API 5L pipeline grades and are widely used for oil and natural gas transmission applications.

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Carbon Steel Welded Steel Pipe Manufacturer