What is the warranty policy?

We provide warranty and after-sales service for our welded steel tubes.

What are the standard dimensions for square tubes?

Common sizes include 20x20 to 800x800mm with wall thicknesses ranging from 1.2mm to 46mm.

Premium ERW Steel Tubes for Construction and Industrial Use

Name: Premium ERW Steel Tubes for Construction and Industrial Use
Brand: Qingdao Wanrunda Imp and Exp Co., Ltd.
SKU: 696685242

Shandong, ChinaQingdao Wanrunda Imp and Exp Co., Ltd.

US$580.00

10-19 Tons

US$575.00

20+ Tons

Product profile

Customization

Available

After-sales Service

Provided

Warranty

Provided

Model NO.

OD21.5mm to OD508mm / 20X20-600X600mm / 20X30-400X

Type

Welded

Technique

ERW

Material

Carbon Steel

Surface Treatment

Black

Usage

Pipeline Transport, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Square/Round/Rectangular

Steel Grade

Q195/Q235A/Q235B/Q345b/ASTM A36/ASTM A53/Ss400/X42

Size

Od21.5mm to Od508mm / 20X20-600X600mm / 20X30-400X

W.T

0.8mm-26 Mm

Length

Normal 6000mm, Range: 4-12meters, or as Requeirmen

Transport Package

Strap in Bundles with Steel Strip, Ani-Tust Oil.

Specification

OD21.5-508mm / 20X20-600X600mm / 20X30-400X400mm

Trademark

Wanrunda

Origin

Qingdao and Tianjin

HS Code

7303009000

Production Capacity

200000mt Per Year

Key features

Wide Size Customization: OD 21.5-508mm, WT 0.8-26mm, Length 4-12m, customizable to requirements.

Multiple Steel Grades: Available in Q235, Q345, ASTM A36/A53, SS400, X42, X52 for diverse needs.

Various Section Shapes: Offers Square, Round, and Rectangular tubes in standard and custom dimensions.

Versatile Surface Treatment: Options include black varnished, oiled, red color, anti-corrosion, 3PE, FBE.

Broad Industrial Application: Suitable for pipeline transport, construction, mining, chemical, and machinery.

Flexible Payment Terms: Supports T/T, L/C at sight, and Western Union for convenient transactions.

Reliable After-Sales Support: Provided warranty and professional after-sales service for customer assurance.

Company profile

Qingdao Wanrunda Imp and Exp Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2008-09-18Nearest Port: Qingdao Port, Tianjin port, Shanghai PortAverage Response Time: ≤15hTerms of Payment: LC, T/T, Western Union, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF

AI-Powered supplier vetting

SummaryQingdao Wanrunda Imp and Exp Co., Ltd. is identified as both a trading company and manufacturer/factory based in Shandong, China. It reports five production lines and listed annual capacities totaling 1,600 tons across steel products, including steel fences, trellises, plates, coils, pipes, and sections. The supplier states that 90% of sales are exports, has held exporting activity since 2008, and possesses self-operated import and export rights. ISO 9000 and ISO 9001 management-system certifications are reported. Its capabilities include punching, bending, welding, galvanizing, electrostatic spraying, powder coating, painting, and oiling, with manufacturing to ASTM, JIS, DIN, and API standards. Evidence is insufficient to assess after-sales service execution, financial credibility, innovation strength, and customer cases.

Supplier typeThe supplier is explicitly classified as both a trading company and manufacturer/factory. It is a China-based limited company in Shandong and reports self-operated import and export rights, with exporting activity beginning in 2008.

CertificationsThe supplier reports holding ISO 9000 and ISO 9001 supplier management-system certifications. These stated certifications provide explicit evidence of formal quality-management credentials.

Production capacityThe supplier reports five production lines and stated annual capacities of 200 tons for steel fence and guardrail, 300 tons for angle-steel and grape trellis, 100 tons for self-nail steel plates and hanger straps, and 500 tons each for steel angles/flat/coil/plate/stainless steel and steel pipe/hollow section/alloy steel. These figures explicitly demonstrate multi-product manufacturing capacity.

Customization capabilityThe supplier states that it has its own processing equipment and can perform punching, bending, welding, galvanizing, electrostatic spraying, powder coating, painting, and oiling. It also states that products can be manufactured according to ASTM, JIS, DIN, and API standards, supporting customized processing and specification compliance.