What standards do your products meet?

Our products meet standards such as ASTM A500, EN10219, DIN, GB, and BS1387.

What is your working time?

Monday-Saturday: 8:00AM-17:30PM (Beijing time, GMT+08.00). We have public holidays during May 1-3, Oct 1-7, and Chinese New Year.

Can you customize the product size and length?

Yes, we offer customization for size (e.g., 20x20 to 100x100mm) and length (6-12m) based on your request.

Hollow Section Prefab House Steel Pipe for Construction

Name: Cold Rolled Pre Galvanized Welded Square / Rectangular Steel Pipe/Q235/BS1387/Hollow Section Prefab House Steel Pipe for Construction
Brand: Shandong Tongmao Special Steel Co., Ltd.
SKU: 2006695852

Shandong, ChinaShandong Tongmao Special Steel Co., Ltd.

US$500.00-1,500.00

5 Tons

Product profile

Customization

Available

After-sales Service

One Year

Warranty

One Year

Type

Seamless or Welded

Technique

ERW or Cold Drawn

Material

Carbon Steel

Surface Treatment

Galvanized

Usage

Machinery Industry, Chemical Industry, Construction & Decoration, Special Purpose

Section Shape

Square

Size

20*20, 25*25, 50*50, 25*50, 40*40, 100*100 Ect

Length

6-12m

Standard

ASTM, DIN, GB

Transport Package

Standard Export Packing

Specification

Q235/195/20#

Trademark

tongmao

Origin

China

HS Code

7306610000

Production Capacity

500ton/Month

Key features

Wide Size Range: Square/Rectangular tubes from 20x20mm to 500x500mm with wall thickness 0.5-20mm.

Galvanized Surface: Zinc coating 40-500g/m2 for enhanced corrosion resistance and durability.

Multiple Standards: Complies with ASTM A500, EN10219, DIN, GB, and BS1387 standards.

Flexible Customization: Custom sizes, lengths (6-12m), and standards available based on requests.

One Year Warranty: Comprehensive one-year warranty coverage for mechanical defects.

Fast Delivery: Normal orders delivered within 10-30 days; samples in 7 days.

Versatile Applications: Suitable for construction, machinery, shipbuilding, and chemical industries.

Quality Assurance: Certified by ISO9001, CE, and RoHS with strict quality control.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceManagement Certification

Shandong Tongmao Special Steel Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Designs CertifiedExport Year: 10 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤5.02h

AI-Powered supplier vetting

SummaryThe supplier is a limited-company trading company with eight employees and a product scope covering copper, aluminum, steel, brass, and stainless-steel products. It has self-operated import/export rights, eight years of export experience, and exports account for 71%–90% of total sales. Production information states annual capacity of 500,000 tons for steel pipe and 10,000 tons for copper pipe, with peak- and off-season lead times both within 15 working days. However, the supplier reports no overseas showrooms, agents, branches, or offline trade-show participation, and has no written complaint-handling, corrective-action, or supplier-service assessment procedures. Quality controls include quality assurance, but finished products are randomly inspected and checked by packing staff, with one quality inspector and no raw-material traceability. Innovation and formal R&D capabilities are limited: no new products were launched in the previous year, and no 3D design, ODM, SDK, or popular-brand OEM services are...

After-Sales capabilityThe supplier has no overseas showroom, overseas agent or branch, or offline trade-show participation. It also has no written corrective-and-preventive-action procedures, complaint-handling procedures, or effective supplier-service assessment records, although it accepts multiple quotation and payment terms and reports lead times within 15 working days.

R&D capabilityThe supplier reports no new products in the previous year and does not provide 3D software design, ODM, SDK, or popular-brand OEM services. Its stated R&D-related service is customization from samples, indicating limited innovation capability rather than a documented product-development program.

Production capacityThe supplier provides stated annual productivity of 500,000 tons for steel pipe and 10,000 tons for copper pipe, with peak- and off-season lead times both within 15 working days. It has export experience of eight years, self-operated import/export rights, and export sales of 71%–90%; however, quality inspection is limited to random inspection, packing-staff checks, one inspector, and no raw-material traceability.

Customization capabilityCustomization from samples is explicitly available in both the R&D/design-related and product-capability information. No broader 3D, ODM, SDK, or formal product-development capability is stated, so the confirmed capability is sample-based customization.