Name: China Wholesale Seamless Steel Pipe Manufacturers Suppliers Factory - Shenzhoutong Steel Pipe
Brand: Shenzhoutong
SKU: 318564375

Products Description

Seamless steel pipe is a hollow steel tube without welding seams, manufactured by piercing solid steel billets. It is widely recognized for high pressure resistance, excellent mechanical strength and uniform structure. We supply wholesale seamless steel pipes for global clients, with our own factory and independent website, supporting customized sizes, material grades and third-party inspection.

Specifications

1	Outer Diameter: 6mm – 630mm
2	Wall Thickness: 1mm – 100mm
3	Length: 1m – 12m, or custom cut length as request
4	End Type: Plain end / Beveled end / Threaded end
5	Surface Treatment: Black painted, varnish, anti-rust oil, 3PE/2PE/FBE coating, galvanized
6	Package: Bundled with steel strips, wooden case or as customer's requirement
7	Tolerance: OD ±0.5%, WT ±10%, Length ±10mm

Material & Standards

Applicable Standards：API 5CT, API 5L, ASTM A53, ASTM A106, ASTM A213, ASTM A335, EN 10216, GB/T 8163, GB/T 6479, GB/T 9948.

Common Grades: Carbon Steel: A106 Gr.B, A53 Gr.B, 20#, Q345B, X42, X52, X60, X65, X70 Alloy Steel: 15CrMo, 12Cr1MoV, 4130, 42CrMo OCTG Grades: J55, K55, N80, P110.

Chemical Composition & Mechanical Properties

We strictly control chemical composition (C, Si, Mn, P, S, Cr, Mo, Ni, V) within standard limitation. Mechanical performance covers tensile strength, yield strength, elongation, hardness, impact test. All test certificates (MTC) will be provided together with goods.

Production Process

Raw steel billet inspection → Heating → Rotary piercing → Hot rolling / Cold drawing → Sizing & straightening → Cutting → Heat treatment (Normalizing / Tempering / Quenching) → Non-destructive testing → Surface cleaning → Dimension check → Marking → Packing → Delivery.

Application

1	Oil & gas transmission pipeline, oil casing and tubing
2	High pressure boiler, power plant heat exchanger tubes
3	Chemical industry, high-pressure fluid pipeline
4	Mechanical manufacturing, hydraulic cylinder, machinery parts
5	Construction structure, bridge support
6	Water supply, natural gas pipeline, mining equipment

Our Advantages

1	Wholesale factory direct supply, competitive price, no middleman markup
2	Full size range & multiple steel grades, support OEM & ODM custom production
3	Complete production line, strict quality control in every procedure
4	Accept third-party inspection: SGS, BV, PMI, UT, MT, RT
5	Export experience for global markets, professional export documents
6	Own independent website & Google SEO promotion, stable supply capacity
7	Fast lead time, flexible shipping by sea / air / container

Inspection & Quality Control

1	Raw material incoming inspection
2	PMI positive material identification test
3	Ultrasonic testing (UT), Magnetic particle testing (MT)
4	Hydrostatic pressure test
5	Dimension & visual inspection
6	Mechanical and chemical lab test
7	Mill Test Certificate (MTC) issued with each batch

fAQ

Q: Q1: Are you a manufacturer or trading company?

A: A: We are professional seamless steel pipe manufacturer with export wholesale business. We have our own factory and independent website. We support Google SEO promotion for global buyers.

Q: Q2: What is your MOQ?

A: A: Small trial order is acceptable. For bulk wholesale order, MOQ is 1 ton.

Q: Q3: Can you provide customized size and coating?

A: A: Yes. Custom outer diameter, wall thickness, length and anti-corrosion coating like 3PE are available.

Q: Q4: What documents can you provide?

A: A: Mill Test Certificate (MTC), commercial invoice, packing list, bill of lading, SGS/BV inspection report, PMI report.

Q: Q5: How about the delivery time?

A: A: Normally 15–35 working days after receiving deposit, depends on order quantity.

Q: Q6: What payment terms do you accept?

A: A: T/T, L/C at sight, negotiable for large wholesale orders.

Q: Q7: Can you do third-party inspection before shipment?

A: A: Yes, SGS, BV and other authorized inspection are welcomed.