What is the warranty period for your products?

We provide a 24-month warranty which includes free repair and replacement within two years.

Can you customize the length of the pipes?

Yes, standard length is 3-12m, but we can also produce according to customer's requirement.

API 5L Grade B Carbon ERW Black Steel Pipes for Line Pipes

Name: API 5L Grade B Carbon ERW Black Steel Pipes for Line Pipes
Brand: Permanent Steel Manufacturing Co., Ltd.
SKU: 1988604795

Hunan, ChinaPermanent Steel Manufacturing Co., Ltd.

US$197.00-507.00

1 Ton

Sample price:US$800.00/ton.Request sample

Product profile

Customization

Available

After-sales Service

Free Repair and Replacement Within Two Years

Warranty

24months

Type

Welded

Technique

ERW

Material

Carbon Steel

Surface Treatment

Antiseptical

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Round

Transport Package

Packed in Bundle or Pack in Loose

Trademark

Permanent Steel Manufacturing Co., Ltd

Origin

China

Production Capacity

200000/Tons

Key features

ERW High Strength Weld: High-frequency resistance welding ensures better mechanical strength than ordinary welded tubes.

24-Month Warranty: Includes free repair and replacement services within two years of purchase.

Wide Size Range: Available in OD 1/2'-24' and wall thickness 1.65-20mm for diverse applications.

Multiple Surface Treatments: Options include black, galvanized, anti-rust oil, and 3-layer PE coating.

Comprehensive Testing: Undergoes hydrostatic, NDT, flattening, and mechanical property tests.

ISO 9001 Certified: Manufactured under strict quality and environmental management systems.

Flexible Payment Terms: Accepts T/T, L/C, and usance L/C for 30-120 days.

Company profile

Experienced TeamFast DeliveryManagement CertificationIn-stock Capacity

Permanent Steel Manufacturing Co., Ltd.

Hunan, China

Business Type: Manufacturer/FactoryExport Year: 2017-04-01Nearest Port: TIANJIN, SHANGHAIAverage Response Time: ≤5.18hTerms of Payment: T/TInternational Commercial Terms(Incoterms): FOB, EXW, CFR, CIF

AI-Powered supplier vetting

SummaryPermanent Steel Manufacturing Co., Ltd. is identified as a China-based manufacturer/factory producing steel pipes and fittings, with production bases in Shandong and Tianjin and headquarters in Hunan. The supplier has self-operated import and export rights, eight years of export experience, and exports representing 71%–90% of total sales. It offers customization from samples and reports in-stock service capacity, but lacks overseas warehouses, showrooms, agents or branches, and has not participated in offline trade shows. Service governance is weakly documented: no written supplier-service assessment procedures or approved supplier list are reported. R&D-related capabilities are limited, with no ODM, SDK, or OEM service for popular brands. ERP, OA, CRM, and SAP-based digital management are not established. Certification evidence, financial credibility evidence, and customer case evidence are insufficient.

Supplier typeThe supplier is explicitly identified as a manufacturer/factory and a limited company. Its stated business focuses on steel pipes and fittings, while its business scope also includes marine equipment, components, supporting services, and import/export activities.

After-Sales capabilityThe supplier reports in-stock service capacity and accepts multiple quotation terms, including FOB, CIF, CFR, and EXW. However, it has no overseas warehouse, showroom, agent, or branch, serves zero stated overseas countries through such coverage, and has no written service-capability assessment procedures or approved supplier list, indicating limited documented service infrastructure.

R&D capabilityThe supplier can customize products from samples, but explicitly does not provide ODM services, popular-brand OEM services, or an available SDK. It also lacks ERP integration and reports zero use of OA, CRM, and SAP systems, providing no evidence of strong product-development or digital innovation capability.

Production capacityThe supplier is a steel pipe and fittings factory with production bases in Shandong and Tianjin, 30 employees, in-stock service capacity, and stated one-month average lead times in both peak and off-season. It also has 50 qualified suppliers for service capability, although no written assessment procedure or approved supplier list is maintained.

Customization capabilityThe supplier explicitly offers customization from samples, and its company description states that it provides customized products and services. This is direct evidence of sample-based customization capability, though it does not establish broader design or ODM capability.

Product Q&A

Q:How long is your delivery time?

Depends on pipes size and quantity. 7-10 days for stocked steel pipe and 20-40 days for new productions according to quantity.

Q:Do you provide samples? Is it free or extra?

Yes,we could offer free steel pipe sample for your evaluation.

Q:What is your terms of payment?

TT payment way, TT+LC, or 100% sight LC and usance L/C for 30-120days,the specific payment should be addressed by further discussion.

Q:What standards do your steel pipes comply with?

Our pipes comply with ASTM 5L, ASTM A53, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217, and various other international standards.

Q:What are the available surface treatments?

We offer lightly oiled, hot dip galvanized, electro galvanized, black, bare, varnish coating/anti rust oil, and protective coatings like Coal Tar Epoxy, Fusion Bond Epoxy, and 3-layers PE.

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API 5L Grade B Carbon ERW Black Steel Pipes for Line Pipes