Does the product have quality inspection before loading?

Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.

How to pack the products?

The inner layer has a waterproof paper outer layer with iron packaging and is fixed with a fumigation wooden pallet. It caneffectively protect products from corrosion during ocean transportation.

Premium Hot Dipped Galvanized Zinc Culvert Pipe for Heavy Duty Applications

Name: Premium Hot Dipped Galvanized Zinc Culvert Pipe for Heavy Duty Applications
Brand: Shandong Tongmao Special Steel Co., Ltd.
SKU: 2157296265

Shandong, ChinaShandong Tongmao Special Steel Co., Ltd.

US$650.00

1-14 Tons

US$600.00

15-29 Tons

US$550.00

30+ Tons

Product profile

Customization

Available

After-sales Service

One Year

Warranty

One Year

Model NO.

customized

Type

Welded

Technique

ERW

Material

Carbon Steel

Surface Treatment

Polished

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

Product Name

Galvanized Tube/Pipe

Zinc Coating

30g-275g

Outer Diameter

20mm~508mm

Wall Thickness

1mm~12mm

Technology

Hot Dipped Galvanized

Tolerance

± 0.01mm

Delivery Time

7-15 Days

Transport Package

Standard Packing

Trademark

TongMao

Origin

China

Production Capacity

1000 Tons/Month

Key features

Hot Dipped Galvanized: Zinc coating ranges from 30g to 275g for superior corrosion resistance.

Wide Size Range: Outer diameter 20mm-508mm and wall thickness 1mm-12mm available.

Multiple Material Grades: Includes 10#, 20#, Q235, Q345, A53, and various St grades.

Fast Delivery: Standard delivery time is within 7-15 days.

Global Sample Service: Samples can be sent to any location worldwide.

Strict Quality Control: All products undergo strict quality inspection before packaging.

Secure Packaging: Waterproof paper, iron packaging, and fumigation wooden pallets.

Factory Visits Welcome: Customers from all over the world are invited to visit the factory.

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: ≤5.49h

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.