What are the lead times for production?

Lead time is within 15 working days or one month for both peak and off-peak seasons.

Do you offer OEM and ODM services?

Yes, we provide both OEM and ODM services with a team of 10 R&D engineers.

What certifications does the manufacturer hold?

The factory is certified with ISO9001:2015, ISO45001:2018, and ISO14001.

Q355 Square Hollow Section Iron Pipe Rectangular Andc350 C250 Square Tube

Name: Q355 Square Hollow Section Iron Pipe Rectangular Andc350 C250 Square Tube
Brand: Tianjin RuiTong Iron & Steel Co., LTD.
SKU: 1933366512

Tianjin, ChinaTianjin RuiTong Iron & Steel Co., LTD.

US$550.00-700.00

1 Ton

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

3months

Warranty

1 Years

Model NO.

20x20mm-400x400mm

Type

Welded

Technique

Hot Rolled

Material

Carbon Steel

Surface Treatment

Black Paint/Galvanized/Oil

Usage

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

Section Shape

Square

Standard

ASTM A500 ,GB/T3094

End of Pipe

Plain/Be

W.T

1.0-20mm

Payment

at Sight L/C, 30%T/T

Certificate

ISO 9001

Tolerance

+-1-5%

Section

Square and Rectanglar

Length

5.8-12m

Main Use

Building Material Structure,Fence,Furniture

Alloy or Not

Non-Alloy

Grade

a,B,Grade250,Grade350

Trade Term

Fob/CFR/CIF

Surface

Oil,Black ,Varnish,Hot Dipped Galvanized

Packing

in Bundles with Water Proof Plastic Tarpaulin

Transport Package

with Plastic Tarpaulin

Specification

20x20mm-400x400mm

Trademark

RUITONG

Origin

Tianjin of China

HS Code

73066100

Production Capacity

500000

Key features

Diverse Surface Treatments: Available in Black Paint, Galvanized, and Oil finishes for various environments.

Wide Application Range: Suitable for construction, pipelines, machinery, oil/gas drilling, and furniture.

Customization Options: Supports customization from samples, designs, full customization, and minor adjustments.

ISO Certified Quality: Manufactured under ISO9001:2015, ISO45001:2018, and ISO14001 management systems.

Flexible Payment Terms: Accepts LC, T/T, D/P, PayPal, and Western Union for secure transactions.

Fast Lead Time: Peak and off-peak season lead times are within 15 working days or one month.

OEM and ODM Services: Full OEM and ODM services available with 10 dedicated R&D engineers.

Strict Quality Control: 10 QA/QC inspectors perform random visual and functional inspections on finished products.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceExperienced Team

Tianjin RuiTong Iron & Steel 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: 16 years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤18h

AI-Powered supplier vetting

SummaryThe supplier is a combined manufacturing and trading entity whose stated business includes metal-material manufacturing, wire-rope production, metal-material sales, and import/export activities. It reports broad customization, ODM and OEM capabilities, with 16 years of export experience. Quality and service processes are documented, including finished-product inspection, complaint handling, corrective actions, and supplier assessment procedures. It has inventory capacity and accepts multiple payment and quotation terms, but lacks overseas warehouses, branches, agents, showrooms, and offline trade-show experience. Financial information is represented only by reporting years, without assessable financial performance data. The supplier reports no available SDK and no established AI-based sustainable-development management capability. A significant operational concern is the absence of a valid manufacturing contract with associated subcontractors.

Supplier typeThe supplier is identified as a combined company, with business activities covering metal-material manufacturing, wire-rope products, metal-material sales, import/export, and technology import/export. Its combined facility is described as a spiral steel pipe production line, indicating a manufacturing-oriented operating profile.

After-Sales capabilityThe supplier has documented procedures and records for customer complaints and corrective/preventive actions, supporting a structured service-response process. However, it has no overseas agents or branches, no overseas warehouse, and no overseas showroom, which limits evidence of localized after-sales coverage.

R&D capabilityThe supplier reports new products during the past year, ODM services, and broad R&D-related customization capabilities. However, it has no available SDK and reports no established AI model for big-data processing and decision-enabled management, so innovation evidence is positive but incomplete.

Production capacityThe supplier operates a spiral steel pipe production line, has inventory capacity, and reports documented finished-product inspection and supplier-management procedures. It also states an average lead time of within 15 working days to one month, but the lack of a valid contract with associated subcontractors is a documented production-governance risk.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM capability, providing direct evidence of broad product-development and customization support.

Client casesThe supplier states that it provides OEM services for well-known brands and identifies its own-brand quality-control capability as RuiTong, with a stated quantity of two. These entries provide some customer or brand-related evidence, but no customer names, project details, volumes, or verifiable case descriptions are supplied.