Material Control & Traceability
- Procurement from approved vendors
- Mill Test Certificate (MTC) verification
- Material identification & tagging
- Heat number traceability records
Quality Assurance, Safety & Compliance
Engineering Integrity Backed by Systematic Control
Quality is not an inspection activity. It is an engineering discipline built into every stage of project execution.
Quality Management System
Our QA/QC Framework
Structured to ensure compliance, structural reliability, operational safety and long-term performance.
Fabrication Quality Control
- Welding Procedure Specification (WPS) adherence
- Qualified welders deployment
- Joint fit-up inspection
- Dimensional verification & alignment checks
Non-Destructive Testing
Inspections that confirm weld integrity, structural soundness and compliance with applicable standards.
- UT Ultrasonic Testing
- RT Radiographic Testing
- DPT Dye Penetrant Testing
- MPT Magnetic Particle Testing
Testing & Validation
No System Is Handed Over Without Complete Verification
Protocol
Hydrostatic & Pressure Testing
All storage systems and pressure components go through rigorous validation before commissioning.
- Hydrostatic pressure testing
- Leak detection & tightness verification
- Settlement observation (for tanks)
- Calibration of measuring instruments
- Valve & safety system inspection
- Nitrogen purging (where applicable)
- Performance validation under controlled conditions
NDT
Ultrasonic Thickness Measurement (UT)
Plate thickness is measured with an ultrasonic thickness gauge, following ASTM E797 / ISO 16809. Readings are taken at the top, upper shell (0° and 90°), middle, lower shell and bottom of the tank.
Method: ASTM E797 / ISO 16809
Sample: 90 KL mild steel underground tank
| Location | Reading | Result |
|---|---|---|
| Top | 6.0 mm | Within limit |
| Upper shell 0° | 6.0 mm | Within limit |
| Upper shell 90° | 6.0 mm | Within limit |
| Middle | 6.0 mm | Within limit |
| Lower shell | 6.0 mm | Within limit |
| Bottom | 6.0 mm | Within limit |
Coating
Holiday Detector Test
A holiday detector finds pinholes, gaps and thin spots ("holidays") in the wrapping coating, so they can be repaired before the tank is buried.
- Check that the coating surface is clean and dry.
- Set the test voltage as per the coating manufacturer's recommendation.
- Sweep the electrode steadily over the entire coated surface.
- Mark every holiday where the detector signals.
- Repair the marked areas and retest them.
- Record the results.
The holiday detector test must be completed before backfilling.
Technical Specifications
HSD Storage Tank Specifications
| Parameter | Specification |
|---|---|
| Tank Type | Underground / above-ground HSD storage tank |
| Material | Mild steel – IS 2062 / IS 1079, with MTC verification and heat number traceability |
| Design & Fabrication | IS 10987 (Part 1 & Part 2) |
| Welding | IS 816 / IS 9595, as per qualified WPS |
| Testing | Hydrostatic / pressure testing with leak detection; NDT (UT, RT, DPT, MPT as applicable); holiday detector test on wrapping |
| Coating System | Zinc primer + 2 coats bituminous paint (IS 15758 / IS 10626) |
| Wrapping | 1.5 mm HDPE / PP wrapping with seam sealing |
| Handover Documents | As-built drawings, material test certificates, NDT reports, hydro test reports, compliance documentation |
Safety Management
Safety Is a Structural Responsibility, Not a Formality
Safety is embedded in our engineering practice at every stage of on-site execution.
Hazard Identification
Hazards identified and assessed before work begins.
Site Supervision Protocols
Supervisory engineering presence on site throughout execution.
Work Permit Systems
Work starts only after the required permits are in place.
PPE Enforcement
Personal protective equipment is mandatory for everyone on site.
Safety Compliance Audits
Regular audits with daily progress documentation.
Testing Before Handover
Every system validated through testing before it is handed over.
Our Quality Commitment
Validated, Verified, Documented
We do not merely execute projects. We deliver engineered systems validated through inspection, verified through testing and supported by compliance documentation.
- Zero compromise on safety
- Compliance-driven execution
- Traceable fabrication standards
- Verified commissioning protocols
- Documented engineering transparency
Need a system inspected or tested?
Ask us about hydrostatic testing, NDT and documented commissioning.