What materials are available for these tubes?

Available materials include Gr.A, Gr.B, Gr.C, S195, S235, S355, STK400/SS400, Q195, Q235, and Q345.

What certifications do your products have?

Our products are certified by ISO 9001:2008, SGS, BV, CCIC, API, CE, and TUV.

What is the wall thickness range?

The wall thickness ranges from 1.2mm to 20mm depending on the size.

Black Steel Galvanized Square Tube/Rectangular Hollow Tubular Steel Pipe

Name: Black Steel Galvanized Square Tube/Rectangular Hollow Tubular Steel Pipe
Brand: Tianjin Youfa International Trade Co., Ltd.
SKU: 2099585745

Tianjin, ChinaTianjin Youfa International Trade Co., Ltd.

US$650.00

1-24 Tons

US$640.00

25-199 Tons

US$610.00

200+ Tons

Sample price:US$650.00/ton.Request sample

Product profile

Customization

Available

After-sales Service

Online Service

Type

Welded

Model NO.

Square30

Technique

Hot Rolled

Material

Carbon Steel

Surface Treatment

Black

Usage

Pipeline Transport, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry

Section Shape

Square

Processing Service

Welding, Cutting, Bending

Thickness

0.5 - 16 mm

Certificate

API, CE, ISO9001

Length

5.8-12m

Transport Package

Standard Seaworthy Packing

Specification

EN, GB/T3901 BS EN 39 ASTM A53-2007 BS 1387

Trademark

Youfa

Origin

China Tianjin

HS Code

7304113000

Production Capacity

50000 Ton/Tons Per Month

Key features

Wide Size Range: Square tubes 20x20mm to 600x600mm and rectangular tubes up to 400x600mm available.

Thick Wall Options: Wall thickness ranges from 1.2mm to 20mm to suit various structural needs.

Multiple Material Grades: Available in Gr.A, Gr.B, Gr.C, S235, S355, Q235, Q345, and more.

Global Certifications: Certified by ISO 9001, API, CE, SGS, BV, CCIC, and TUV.

Flexible Customization: Offers full customization, minor customization, and customization from samples or designs.

Fast Delivery: Lead time of 15-45 days after receiving advanced payment.

Low MOQ: Minimum Order Quantity is 1 unit, suitable for small orders.

OEM/ODM Services: Full OEM and ODM services available for custom requirements.

Company profile

Cooperated with Fortune 500Exhibition ExperienceRaw-Materials TraceabilityRaw Materials Reports

Tianjin Youfa International Trade Co., Ltd.

Tianjin, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 12 years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤6.09h

AI-Powered supplier vetting

SummaryThe supplier is a limited company with 83 employees, an affiliated company, a valid import/export license, and stated OEM experience for well-known brands. It offers extensive customization and ODM services, reports new products within the past year, and provides substantial listed production capacity, including 657,000 tons of scaffolding and 50,000 tons of stainless steel pipe and fittings. Service procedures, corrective and preventive actions, and complaint-handling records are stated to exist. However, no valid manufacturing-capacity contract with the factory and related subcontractors is reported, and the supplier lacks overseas warehouses, showrooms, agents, or branches. Digitalization has started, but ERP integration and big-data use are absent. Evidence is insufficient for certifications and specific customer cases.

After-Sales capabilityThe supplier states that it has documented and followed procedures for service-capability assessment, corrective and preventive actions, and customer complaints. It offers in-stock service capacity and one-month stated lead times in both peak and off-season, but has no overseas warehouse, showroom, agent, or branch support.

R&D capabilityThe supplier reports new products within the past year, provides ODM services, and has broad R&D customization capabilities. It has started enterprise digital-process development, but lacks an available SDK, ERP integration, and big-data capability, indicating innovation activity with incomplete digital infrastructure.

Production capacityReported annual capacities include 657,000 tons of scaffolding and 50,000 tons of stainless steel pipe and fittings, alongside several steel-pipe categories. The supplier also reports inventory capability and a one-month lead time, but states that no valid manufacturing-capacity contract exists with its factory and related subcontractors.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization, and also states that it provides ODM services. This is direct evidence of broad customization support.