KeelGaugeIndustrial Procurement Network
Product RFQ page

Square & Rectangular Tube

RFQ intake for square and rectangular hollow sections used in frames, warehouses, solar mounting, and machinery projects.

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Square & Rectangular Tube manufacturing and export sourcing reference
Reference image for product and loading-context discussion. Final supply evidence is supplier-specific.
SpecificationSquare and rectangular hollow sections, project wall thickness
MaterialQ195, Q235, Q355, EN/JIS/GB-oriented grades
StandardsEN10219, JIS G3466, GB/T6728
Surface treatmentBlack, galvanized, painted, anti-corrosion treatment by request
ApplicationsFrames, warehouses, solar mounting, machinery, fabrication
Packing / loadingBundle packing, project labels, destination-port loading support
Certificate checksFPC references, MTC, standard compliance documentation
RFQ specification table

Details to confirm before price comparison

RFQ fieldQualification guidance
SectionSquare or rectangular hollow section
Wall thicknessProject requirement and tolerance confirmation
GradeQ195, Q235, Q355, EN/JIS/GB-oriented grades
SurfaceBlack, painted, pre-galvanized, or hot-dip galvanized
ProcessingCutting, punching, welding, and labels by request
Production-route guidance

How this product is commonly made and qualified

This explains the checkpoints a buyer should verify. It does not claim that KeelGauge manufactures the product or that every supplier uses the same route.

  1. 01

    Verify coil grade, slit width, heat traceability, and section design input.

  2. 02

    Form the strip and complete the longitudinal weld.

  3. 03

    Size the tube into the required square or rectangular section and corner profile.

  4. 04

    Straighten, cut, and control section dimensions, twist, radius, and tolerance.

  5. 05

    Complete punching, drilling, welding, labeling, or cut-length processing when agreed.

  6. 06

    Apply black, painted, pre-galvanized, or hot-dip galvanized surface and export packing.

Platform-owned RFQ, certified supplier matching

Buyer information remains in the platform CRM. Supplier specialists only receive assigned, qualified leads for quotation and manufacturing confirmation after platform matching.

Buyer checks before quotation

  • Can the RFQ compare black tube and galvanized tube?
  • Can warehouse-frame quantities be quoted by tonnage?
  • Can standard and wall-thickness requirements be checked first?
Supplier evidence is matched to the final route

Standards, listings, MTCs, coating records, inspection reports, and project references must belong to the applicable selected supplier and product scope.

Application routes

Where this product is commonly evaluated

ApplicationWarehouse, Solar & Fabrication

Hollow-section and structural pipe RFQs for frames, racks, machinery, and repeat fabrication supply.

ApplicationStructural & Infrastructure

Project sourcing for steel structures, bridges, airports, power systems, and heavy fabrication.

Managed capabilities

Services commonly attached to this RFQ

ServiceDeep Processing

Project-ready cutting, bending, grooving, beveling, punching, threading, and welding coordination.

ServiceSurface Treatment

Galvanizing, painting, oiling, FBE, and multi-layer anti-corrosion coordination.

ServiceInspection & Testing

Visual, dimensional, mechanical, chemical, hydrostatic, NDT, and third-party inspection coordination.

Comparison routes
ProductStructural Pipe

Structured sourcing for medium and heavy-wall structural pipe used in airports, bridges, power grid, and steel structure projects.

ProductGalvanized Steel Pipe

Destination-port RFQs for hot-dip galvanized steel pipe used in fencing, greenhouse structures, water systems, and construction.

Platform Buyer Desk

Build a supplier-ready Square & Rectangular Tube request

Include size, wall thickness, grade, standard, surface, processing, quantity, destination, inspection, packing, and purchase timing.

Start structured RFQ
Buyer data stays in the platform CRM.