What is the lead time for production?

The average lead time is within 15 workdays for both peak and off-season periods.

Is customization service available?

Yes, we support ODM services and can customize products from samples according to specific customer requirements.

What certifications do the pipes have?

Our pipes comply with ASTM, AISI, GB, JIS, DIN, and EN standards, and we provide ISO certification.

Black Surface Stainless Steel Seamless Pipe for Structural with GB 4"-20"

Name: Black Surface Stainless Steel Seamless Pipe for Structural with GB 4"-20"
Brand: Kunqian Steel (Jiangsu) Co., Ltd.
SKU: 2280938165

Jiangsu, ChinaKunqian Steel (Jiangsu) Co., Ltd.

US$1,299.00

1-9 Tons

US$1,289.00

10-99 Tons

US$1,259.00

100+ Tons

Sample price:US$1999.00/piece.Request sample

Product profile

Customization

Available

Type

Stainless Steel Pipes

Standard

ASTM, AISI, GB, JIS, DIN, EN

Grade

300 Series

Certification

ISO, AISI, ASTM, GB, EN, DIN, JIS

Shape

Round

Technique

Hot Rolled

Surface Treatment

Pickling

Product Name

Stainless Steel Tubing

Material

200 Series/300 Series/400series

Keyword

Stainless Steel Pipe

Surface

Ba/2b/No.1/No.3/No.4/8K/Hl/2D/1d

Length

1-12m

Usage

Construction Structure

MOQ

1 Ton

Material Grade

201/202/301/304/304L/310S/316/316L/316ti/321/410

Transport Package

Wooden Crate Packaging

Specification

10mm

Trademark

KUNQIAN

Origin

China

Key features

Customizable Dimensions: Outer diameter 6-800mm, thickness 0.1-100mm, length up to 12000mm or as requested.

Wide Material Selection: Available in 200, 300, 400 series, duplex, and special stainless steels like 316L and 904L.

Superior Durability: Seamless construction ensures no weld weaknesses, ideal for high-pressure and corrosive environments.

Multiple Surface Finishes: Options include BA, 2B, 2D, No.4, HL, 8K, and embossed surfaces for various aesthetic needs.

Comprehensive Certifications: Meets ASTM, AISI, GB, JIS, DIN, EN standards with ISO certification available.

Flexible Customization: Supports ODM services and customization from samples for specific project requirements.

Versatile Applications: Suitable for construction, food processing, medical equipment, automotive, and oil & gas industries.

Reliable Quality Control: Strict random visual inspection and traceable raw materials ensure consistent product quality.

Company profile

Importers and ExportersFast DeliveryStandardized quality controlProduct Certification

Kunqian Steel (Jiangsu) Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 1 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.69h

AI-Powered supplier vetting

SummaryKunqian Steel (Jiangsu) Co., Ltd. is a China-based trading company established in 2025, with eight employees and two cooperative suppliers. It offers stainless steel plates, rolls, and pipes, and states that it provides ODM/OEM customization, processing services, technical support, and foreign-trade services. Design-input, output, review, verification, and validation documents are reportedly available for audit, while finished products are inspected by sampling under documented instructions. Raw materials are traceable and inventory service is available. However, the provided information records no new products launched in the past year, no SDK, no overseas agents, branches, warehouse, showroom, or offline trade-show participation. Financial information for the stated periods shows zero operating revenue, operating cost, gross profit, and operating profit; these figures materially limit assessment of operating scale and financial credibility. No certification information or customer case details are provided.

Supplier typeThe supplier is identified as a limited trading company based in Wuxi, Jiangsu, China, established on 2025-02-19, with eight employees. Its stated product scope covers stainless steel plates, rolls, and pipes, and it reports two cooperative suppliers.

After-Sales capabilityThe supplier states that it has an efficient foreign-trade service system and provides technical support for production and after-sales service, alongside an after-sales guarantee. However, it has no overseas agents or branches, no overseas warehouse or showroom, and no overseas services are reported in the provided data, limiting evidence of local after-sales coverage.

Financial creditThe supplier was established in 2025 and reports zero operating revenue, operating cost, gross profit, and operating profit for the stated financial periods. These explicit figures provide a material deficiency in demonstrated operating financial performance, although they do not by themselves establish insolvency.

Production capacityThe supplier describes advanced production equipment and processing services including cutting, polishing, wire drawing, sandblasting, and welding. It also reports raw-material traceability, documented and uniformly followed inspection instructions, random finished-product inspection, one quality inspector, inventory capability, and two cooperative suppliers; however, its entity type is trading company and no production capacity figures are provided.

Customization capabilityThe supplier explicitly offers ODM/OEM customization and processing according to customer needs, including size cutting, surface treatment, and welding. Its design capability is listed as customization from samples, and technology engineers confirm customer requirements and design new products, providing direct evidence of customization capability.

Product Q&A

Q:What are the available material grades?

We offer a wide range of grades including 200 series (201, 202), 300 series (304, 316, 316L), 400 series (410, 430), duplex stainless steel (2205, 2507), and special grades like 904L and 310S.

Q:Can the pipe dimensions be customized?

Yes, the outer diameter ranges from 6-800mm, thickness from 0.1-100mm, and length up to 12000mm or as per customer request.

Q:What surface treatments are available?

We provide various surface finishes including BA, 2B, 2D, No.4, HL, 8K, and embossed surfaces to meet different aesthetic and functional requirements.

Q:What is the minimum order quantity (MOQ)?

The minimum order quantity is 1 Ton.

Q:What are the payment terms?

We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payments.