Quality
Excellence in Every Step
Rigorous quality control, international standards, and a commitment to delivering the finest steel pipes and tubes.
Quality Control
Our quality control process encompasses every stage of production—from raw material inspection to final product testing. Qualified professionals conduct rigorous checks to ensure compliance with national and international standards.
We believe that quality is built into the process, not inspected in. That is why we integrate checks at each critical stage and maintain documented procedures for traceability and continuous improvement.
These checks apply across the full Tubora range — Circular Hollow Sections (CHS), Square Hollow Sections (SHS) and Rectangular Hollow Sections (RHS) — all produced on the same ERW manufacturing line. Dimensions, grades and standards for each profile are listed in the Tubora product specifications.
Raw Materials
Incoming material tested for composition, dimensions & surface quality
Production
In-process checks at forming, welding & finishing stages
Safety
Workplace safety & product safety standards maintained
Delivery
Final inspection & documentation before dispatch
Quality Standards
Tubora Pipes adheres to ISI, BS, and other international standards. Our products are manufactured using high-grade raw materials and undergo comprehensive testing before dispatch.
ISI
Indian Standards Institute
Our products meet the Bureau of Indian Standards (BIS) specifications for steel pipes and tubes, ensuring reliability for the Indian market.
BS
British Standards
Compliance with British Standards for dimensions, mechanical properties, and testing methods for global acceptance.
ASTM
International Standards
Where required, we align with ASTM and other international norms for export and specialized applications.
Our Process
Tubora Pipes adheres to ISI, BS, and other international standards. Our products are manufactured using high-grade raw materials and undergo comprehensive testing before dispatch.
01
Material Selection
Material SelectionOnly certified raw materials from approved suppliers are used. Chemical and physical properties are verified before use.
02
Manufacturing
Controlled forming, welding, and finishing operations with in-line checks and documented parameters.
03
Testing & Inspection
Dimensional, mechanical, and surface quality tests as per applicable standards. Test certificates maintained.
04
Dispatch
Final release after quality approval. Proper packing and documentation for safe delivery.
Certifications & Compliance
Tubora Pipes adheres to ISI, BS, and other international standards. Our products are manufactured using high-grade raw materials and undergo comprehensive testing before dispatch.
Material Selection
BS Standards Compliance
Industry Excellence Awards
Documented Quality Management
Third-party Audit Ready
How We Test Every Tubora Section
Quality at Tubora is built into the line, not checked at the end. Every circular, square and rectangular hollow section made at our ERW plant in Janjgir-Champa, Chhattisgarh passes through the same set of tests, from the moment an HR coil arrives to the moment a bundle is loaded for dispatch. The aim is simple: the size, wall and strength you order are the size, wall and strength you receive.
| Test | What it checks | When |
|---|---|---|
| Spectrometer chemical analysis | Chemical composition of incoming HR coil, so the steel grade and weldability are right before forming starts | Raw material inspection |
| Eddy current testing | Continuity of the high frequency induction weld seam, picking up cracks or lack of fusion along the length | In-line, after welding |
| Hydro testing | Leak-tightness of the tube under water pressure | After sizing and cutting |
| Mechanical testing | Yield strength, tensile strength and elongation of samples against the specified grade | Per production lot |
| Dimensional checks | Outside dimensions, wall thickness, straightness, squareness and corner radius against IS tolerances | In-process and final inspection |
| Visual inspection | Surface finish, weld bead trimming, end cuts and marking | Before bundling and dispatch |
Standards We Manufacture To
Tubora sections are manufactured and certified under BIS / ISI:
- IS:1161 – steel tubes for structural purposes. Covers our Circular Hollow Sections (CHS) from 25 NB to 200 NB (33.7–219.1 mm OD).
- IS:4923 – hollow steel sections for structural use. Covers our Square Hollow Sections (SHS) from 25×25 to 180×180 mm and Rectangular Hollow Sections (RHS) from 40×20 to 200×100 mm.
Both standards set the dimensions, mass, mechanical properties and tolerances that our inspection team checks against.
Manufacturing Tolerances
These are the tolerances our sections are held to, as published in the Tubora product catalogue:
| Parameter | CHS (IS:1161) | SHS / RHS (IS:4923) |
|---|---|---|
| Wall thickness | ±5% | ±7.5% |
| Weight on individual length | ±5% | +10% / −8% |
| Outside dimension | Up to 48.3 mm OD: +0.4 / −0.8 mm; over 48.3 mm: ±1% (min ±0.5 mm) | ±1% (min ±0.5 mm) |
| Corner radius | – | 3t maximum |
| Squareness of sides | – | 90° ±2° |
For the full size and weight range, see the round pipe weight chart, square pipe weight chart and rectangular pipe weight chart.
From Coil to Dispatch: 10 Controlled Steps
- Raw material inspection
- Coil slitting
- Roll forming
- High frequency induction (HFI) welding
- Bead trimming
- Cooling and sizing
- Automatic cutting
- Hydro testing
- Quality inspection
- Bundling and dispatch
Need test certificates or a mill test report with your order? Mention it in your enquiry and our team will confirm what can be supplied with the consignment.