Pipe

Seamless Steel Pipes

Carbon steel and alloy steel seamless pipes for pressure piping packages.

Material / Standard
ASTM A106/A53, API 5L, ASTM A192, DIN17175 ST35.8/37, DIN1629 ST52, ASTM A210, ASTM A335, ASTM A179
Size range
1/2" - 24"
Wall (Schedule)
SCH 20/40/80/120/160/XXS
Reply within 4h on weekdays

Description

The steel pipe material includes real photos of seamless pipes, spiral pipes, stainless steel pipes, alloy steel pipes, longitudinal welded pipes, anti-corrosion pipes and insulated pipes for project package supply.

Applications

Oil, chemical, natural gas, power, industrial plant and piping projects.

Technical specs

Material, outside diameter, wall thickness, length, surface treatment, inspection requirement and standard are confirmed by drawing or RFQ.

Typical industry applications

How procurement teams typically deploy this material/category in real projects. Compare against your project spec before locking the BOM.

  • Oil & Gas PipelinesOnshore crude / gas trunk lines: API 5L X42 and below pair with A234 WPB; X52-X70 must pair with MSS SP-75 WPHY-52/60/65/70 (yield-strength match). Service window -29 to +120°C (B31.4 / B31.8 onshore practice).
  • Water & Fire ProtectionMunicipal water, cooling-water loops, fire mains; carbon steel with galvanizing or epoxy lining.

Standards and Materials

The following supports product selection and RFQ communication. Final requirements follow drawings, standards and purchase documents.

CategoryPipe
Material / StandardASTM A106/A53, API 5L, ASTM A192, DIN17175 ST35.8/37, DIN1629 ST52, ASTM A210, ASTM A335, ASTM A179
Size range1/2" - 24"
Wall (Schedule)SCH 20/40/80/120/160/XXS
ScopeCarbon steel and alloy steel seamless pipes for pressure piping packages.

RFQ

Request for Quotation

  • 4-hour reply
  • 200+ projects
  • ISO 9001
  • 14 languages

Just email + a line about your need is enough. More details = faster reply.

Add specs (optional)

Quantity / standard / drawing — speeds up our quote, but not required.

PDF / DWG / STEP / Excel / images, ≤ 5MB

✓ Drawings kept confidential · ✓ Reply within 4 business hours · ✓ No marketing emails

Download spec sheet (PDF)

Frequently asked questions

What standards does Hebei Haihao manufacture seamless steel pipes to?
We produce to ASTM/ASME (A234 WPB / WPC / WP1 / WP11 / WP12 / WP22 / WP91; A403 stainless; A420 WPL6 low-temperature), EN (EN 10253 (Parts 1–4)), JIS (B2311 / B2312 / B2313), GB (GB/T 12459 / GB/T 13401) and MSS SP-75 high-strength low-alloy. Final material and standard are confirmed by drawing or RFQ.
What is the maximum size capability for seamless steel pipes?
Bends up to Φ2200 mm large diameter; pushed and pressed fittings up to DN1500 with 100 mm wall thickness; forged flanges up to Φ4000 mm; single-piece forging up to 50 tons. Exact capability is confirmed by drawing and material grade.
What inspection and quality documents are provided?
Standard package: EN 10204 3.1 material certificate, chemical analysis, mechanical test report, dimensional inspection report, NDT report (PT/MT/UT/RT as required), heat-treatment record, packing list. Third-party witness (SGS / BV / TÜV / Lloyd's) is available on request.
What is the typical lead time?
Standard fittings in common sizes: 15-30 days. Non-standard sizes or special materials: 30-60 days. Large-diameter pushed fittings and forged flanges: 45-90 days. Prefabricated piping spools depend on drawing complexity. Exact lead time is confirmed against current production schedule when the RFQ is received.
What certifications does Hebei Haihao hold?
ISO 9001 quality management, ISO 14001 environmental management, ISO 45001 occupational health & safety, ABS Type Approval for flanges and fittings, and a national manufacturing license for pressure-piping components. Full certificate images are available on the Certificates page.
What Incoterms and payment terms are supported?
We support FOB, CFR and CIF. Accepted payment: irrevocable L/C at sight only. Final terms are agreed per order value and ongoing relationship.

Related products

无缝对焊管件总览(弯头/三通/异径管/管帽)ElbowASTM A234

Seamless Butt Welding Pipe Fittings

Seamless butt-welding fittings overview: elbows, tees, reducers and caps to ASME B16.9 / B16.28 / MSS SP-75 / GB/T 12459, for low- to high-pressure piping (including ASME B31.3 Chapter IX).

Material / Standard
ASTM A234 WPB/WPC/WP11/WP22/WP91, ASTM A420 WPL6/WPL3, ASTM A403 WP304/WP316L, MSS SP-75 / ASTM A860 WPHY-52/60/65/70
Size range
1/2" - 48" (21mm - 1219mm)
View details
锻制法兰产品图Flange

Forged Flanges and Nonstandard Forgings

Forged flanges and nonstandard forgings for industrial piping packages.

Material / Standard
Carbon Steel, Stainless Steel, Alloy Steel
Size range
ASME/ANSI B16.5 / B16.47 ranges shown in company profile
View details
等径三通产品图TeeASME B16.9

Straight Tees and Crosses

Butt welding straight tees and crosses for carbon and ferritic alloy steel piping.

Material / Standard
ASTM A-234, ASME/ANSI B16.9
Size range
1/2" - 42" listed in dimensional tables
View details
异径管产品图ReducerASME B16.9

Reducing Tees and Reducers

Concentric and eccentric reducers plus reducing tees for butt welding piping.

Material / Standard
ASTM A-234, ASME/ANSI B16.9
Size range
Reducers and reducing tees listed up to 48 inch combinations
View details

Reply within 4h