How long is the delivery time?

The average lead time is within 15 workdays regardless of the season.

Do you offer OEM and ODM services?

Yes, both OEM and ODM services are available.

What standards do your pipes meet?

Our pipes comply with ASTM A500, JIS G3466, EN10210, and GB/T6728-2002 standards.

Welded Steel Pipes Square Tubes

Name: Square/Rectangle Seamless/Welded Steel Pipes Square Tubes
Brand: Qingdao Ironsteel International Trading Co., Ltd.
SKU: 764831535

Shandong, ChinaQingdao Ironsteel International Trading Co., Ltd.

US$5,500.00

5-24 Tons

US$540.00

25-49 Tons

US$530.00

50+ Tons

Product profile

Customization

Available

Type

Seamless/Welded

Technique

Cold Drawn, ERW

Model NO.

square pipe

Material

Carbon Steel, Alloy Steel,

Surface Treatment

Bare Pipe, Black Pipe

Usage

Construction & Decoration, Special Purpose

Section Shape

Square, Rectangle

Length

6meters, 9meters, 12meters

Surface

Black Painting, Bare Pipe

Size

20mm~600mm

Thickness

2mm~20mm

Transport Package

Standard Seaworthy Packing

Specification

ASTM, JIS, DIN

Origin

China

HS Code

73066100

Production Capacity

2000tons Per Month

Key features

Wide Size Range: Square tubes from 16x16mm to 1000x1000mm; Rectangle tubes up to 900x900mm.

Multiple Material Options: Available in Carbon Steel and Alloy Steel grades including Q195, Q235, Q345B.

Seamless and Welded Types: Offers both seamless and welded pipes produced via Cold Drawn and ERW techniques.

Flexible Customization: Full customization available for length, surface, size, and thickness based on samples or designs.

Comprehensive Standards: Meets ASTM A500, JIS G3466, EN10210, and GB/T6728-2002 standards.

Diverse Surface Treatments: Options include bare pipe and black painting to suit various application needs.

Fast Lead Time: Average lead time within 15 workdays for both peak and off-peak seasons.

ISO9001 Certified: Manufacturing process certified under ISO9001:2015 management system.

Company profile

Importers and ExportersYears of Export ExperienceManagement CertificationHigh Repeat Buyers Choice

Qingdao Ironsteel International Trading Co., Ltd.

Shandong, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 20 years CertifiedNearest Port: Qingdao Port, Tianjin PortAverage Response Time: ≤7.17h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier offering 3D software design, ODM, OEM, and broad customization services. It reports quality-related certification support, including API, ISO, IBR, and SGS certifications, and holds an ISO9001:2015 certificate. Production and service lead times are stated as within 15 working days in both peak and off-peak seasons, with 11–20 quality-control staff and North America as the primary export market. However, the supplier has no available SDK, launched no new products in the past year, has only one year of R&D engineer experience reported, and lacks overseas showrooms, agents or branches, and offline trade-show participation. Environmental assessment documentation, raw-material traceability status, quality assurance status, and several process records are incomplete or unavailable. OEM service for popular brands provides evidence of customer-related experience, but no specific customer names or cases are supplied.

Supplier typeThe supplier explicitly identifies itself as a professional technical supplier and provides 3D software design services. It also offers ODM and OEM services, indicating both technical-service and manufacturing capabilities.

CertificationsThe supplier states that it can provide certifications such as API, ISO, IBR, and SGS according to customer requirements, and specifically reports an ISO9001:2015 certificate. This is explicit evidence of certification-related capability, although no separate certificate details or validity dates are provided.

After-Sales capabilityThe supplier has no overseas showroom, overseas agent or branch, or offline trade-show participation, and reports zero countries with overseas services. It has written procedures for corrective actions and complaint handling, but no written records, so international after-sales coverage and documented execution remain limited.

R&D capabilityThe supplier provides professional technical services, 3D design, ODM, and customization, but reports no available SDK and no new products launched during the past year. Only one year of total R&D engineer experience is stated, while product-information R&D capability is also marked as having no new products, limiting evidence of recent innovation output.

Production capacityThe supplier reports 11–20 quality-control staff, an annual production-output range, and lead times within 15 working days during both peak and off-peak seasons. These statements support production and fulfillment capability, although detailed production capacity, equipment, and factory performance records are not provided.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. Its stated 3D design, ODM, and OEM services further support a broad ability to adapt products to customer requirements.