What are the payment terms?

Payment terms include 30% TT in advance and the balance against the copy of B/L, or irrevocable L/C at sight, LC, T/T, PayPal, D/P, Small-amount payment, Western Union.

What is the delivery time?

Delivery time is within 7-15 days after receiving the 30% TT deposit.

Can the product be customized?

Yes, customization from samples is available for OD, thickness, length, and surface treatment.

ASTM A500 Cold Rolled / Hot Rolled Black Annealed ERW Welded Hollow Section Square Steel Tube

Name: ASTM A500 Cold Rolled / Hot Rolled Black Annealed ERW Welded Hollow Section Square Steel Tube
Brand: TIANJIN FRIEND STEEL TUBE CO., LTD.
SKU: 1986032965

Tianjin, ChinaTIANJIN FRIEND STEEL TUBE CO., LTD.

US$760.00-820.00

10 Tons

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Type

Welded

Technique

ERW

Material

Carbon Steel

Surface Treatment

Galvanized

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Od

20mm*20mm~750mm*750mm

Thickness

1.0mm~20mm

Length

0.5m~12m

Surface

Black/Galvanized/Paint

Transport Package

Package by Bundle

Specification

Q195/Q235/Q345

Trademark

FRD

Origin

Made in China

HS Code

7306900

Production Capacity

30000tons

Key features

Wide Customization Range: OD 20mm-750mm, Thickness 1.0-20mm, Length 0.5-12m, Surface Black/Galvanized/Paint.

Multiple Material Grades: Available in Q195, Q235, Q345, SS330, SPHC, S185, S235JR, S235JO, S235J2, SS500, ST52.

Diverse Surface Treatments: Options include Black, Galvanized, Paint, Pre-galvanized (60-150g/m2), and Hot-dipped (200-400g/m2).

Versatile Application Scope: Suitable for pipeline transport, boilers, hydraulics, oil/gas drilling, construction, and machinery.

Flexible Packaging Options: Bulk for big OD, steel strips for small OD, plastic bags, or customized per customer requirements.

OEM Service Available: Customization from samples is supported by our manufacturer with 1 R&D engineer.

Strict Quality Control: 100% inspection including visual and function checks with traceable raw materials.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

TIANJIN FRIEND STEEL TUBE CO., LTD.

Tianjin, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: OEM Service Available CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 1 Year CertifiedNearest Port: Tianjin portAverage Response Time: ≤1.39h

AI-Powered supplier vetting

SummaryTIANJIN FRIEND STEEL TUBE CO., LTD. is a China-based limited company established in 2009 and located in Tianjin. It offers steel pipe and scaffolding products, reports five production lines, annual scaffolding-tube productivity of 5,000 tons, and stated order lead times of within 15 working days in both peak and off-peak seasons. The supplier states that it can handle special customer requirements and customized processing using imported materials, and that it maintains a dedicated after-sales team. ISO 9001:2015 and ISO 14001:2015 certificates are reported. Export sales are stated at 71%–90%, with exporting beginning in 2021. However, several capabilities remain unverified, including contract manufacturing status, inventory services, overseas facilities or agents, ODM/OEM, SDK-related R&D, and customer case details. Audit information identifies TÜV Rheinland, but the evaluation result is recorded as 0 without an explained grading scale.

Supplier typeThe supplier is identified as TIANJIN FRIEND STEEL TUBE CO., LTD., a China-based limited company in Tianjin established in 2009. The records also describe it as a combined entity and, in one slice, as a trading company, while its product description identifies steel-pipe and scaffolding manufacturing activities.

CertificationsThe supplier reports ISO 9001:2015 and ISO 14001:2015 certifications. A TÜV Rheinland audit is also recorded with a report period from March 19, 2025 to March 18, 2026, although the audit result is listed as 0 without interpretation.

After-Sales capabilityThe supplier explicitly states that it has a devoted and enthusiastic after-sales service team. It also claims to provide systems for delivery, invoicing, settlement, transportation, and goods storage, supporting a broader service process.

Production capacityThe supplier reports five production lines and annual scaffolding-tube productivity of 5,000 tons, with stated order fulfillment within 15 working days during both peak and off-peak seasons. Its product description covers high-frequency welded pipes, galvanized steel pipes, and scaffolding products, providing explicit evidence of operating production capability.

Customization capabilityThe supplier explicitly states that special customer requirements can be handled and that imported materials can be used for customized processing. However, formal manufacturing-contract status and ODM/OEM service availability are marked unknown, so the evidence supports customization claims but not the broader service categories.

Product Q&A

Q:What is black square&rectangular steel pipe?

Welding pipes is one of the simplest and most durable ways to join piping together and steel pipes can simply be welded together with MIG (metal inert gas), TIG (tungsten inert gas or SMAW (stick metal arc) welding. Before welding two pipes together, avoid any gaps between the two pipes. While welding, take measures to ensure the continual alignment of the two pipes.

Q:What is pre galvanized square&rectangular steel pipe?

The pre-galvanized welded steel piperefers to welded tube which undergo degreasing,rush removal,phosphorization,zand drying processes before galvanization.The treatments before galvanization allow the product to be conveniently plated with a zinc coating,and also ensure uniform coating thickness,strong coating adhesion,and improved corrosion resistance

Q:What is hot dipped galvanized square&rectangular steel pipe?

Hot-dip galvanizing (HDG), as referenced is the process of dipping fabricated steel into a kettle or vat of molten zinc. While the steel is in the kettle, the iron metallurgically reacts with the molten zinc to form a tightly-bonded alloy coating that provides superior corrosion protection to the steel..

Q:What are the available material grades?

Available materials include Q195, Q235, Q345, SS330, SPHC, S185, S235JR, S235JO, S235J2, SS500, and ST52.

Q:What is the minimum order quantity?

The minimum order quantity is 2MT for a trial order, with a standard MOQ of 30 Tons.