IRS & BV Approved · IOCL Vendor Approved · Kolkata, India
Non-Destructive Testing You Can Certify With Confidence
Trusted Partner in Shipping and Industrial NDT Solutions
Who We Are
A Partnership Built on Precision
D.P. Non-Destructive Testing is a Kolkata-based partnership firm providing professional Non-Destructive Testing (NDT) services to the shipping and industrial sectors. Operating from our office at Barakanthalia, Majherpara, North 24 Parganas, West Bengal, we serve clients across the region with certified inspection teams, calibrated equipment, and internationally recognised approvals.
The firm is jointly owned by Mr. Sourav Gupta and Mr. Uday Sarkar, who share equally in the firm's profit and management, and who together bring hands-on technical leadership to every project the firm undertakes.
More About the Firm →Certified & Approved
Recognised by the Names That Matter in Shipping & Industry
Our quality systems and technical competence are approved by classification and inspection authorities, and we are an approved vendor to one of India's largest oil marketing companies.
Approved
IRS Approved
Approved by the Indian Register of Shipping for NDT & Thickness Measurement (TM) across multiple testing methods.
Approved
BV Approved
Approved by Bureau Veritas, supporting classification-society inspection requirements for our shipping clients.
Vendor
IOCL Vendor Approved
Registered and approved vendor to Indian Oil Corporation Limited (IOCL) for NDT services.
Our Expertise
Seven IRS-Approved NDT Techniques, One Accountable Team
From conventional ultrasonic flaw detection to phased array and robotic scanning, our technicians are equipped and approved to deliver a full spectrum of NDT services — with particular depth in shipping inspection.
Ultrasonic Flaw Detection
Sub-surface flaw and weld-defect detection using calibrated UFD equipment.
Liquid Penetrant Testing
Surface-breaking defect detection on ferrous and non-ferrous components.
Magnetic Particle Testing
Fast, reliable surface and near-surface crack detection on magnetic materials.
Radiography Testing
Volumetric weld and casting inspection with permanent radiographic records.
Phased Array UT
Advanced PAUT for detailed weld profiling and defect sizing.
Ultrasonic Thickness Gauging
Precision wall-thickness and corrosion-monitoring surveys.
Robotic Scanning with TM
Robotic crawler-based scanning for thickness measurement in hard-to-access areas.
Need a Custom Scope?
Tell us your vessel, structure or plant requirement and we will propose the right technique mix.
Get in TouchReady to Schedule an Inspection?
Speak with our team about drydock, afloat, or plant NDT requirements — including urgent turnaround.
Contact D.P. Non-Destructive TestingAbout D.P. Non-Destructive Testing
A Kolkata-based partnership firm delivering certified NDT services to the shipping and industrial sectors.
Company Background
Built on Technical Ownership
D.P. Non-Destructive Testing was established as a partnership firm to provide dependable, standards-compliant Non-Destructive Testing services to the shipping and industrial sectors operating in and around Kolkata and North 24 Parganas, West Bengal.
As a partnership, the firm is directly managed by its owners rather than a layer of external management — meaning every inspection contract carries the direct accountability of the partners themselves. This structure allows us to remain responsive, keep decision-making close to the work, and maintain consistent quality across every assignment, whether it is a single thickness survey or a multi-technique drydock inspection.
Our approvals from the Indian Register of Shipping (IRS) and Bureau Veritas (BV), together with our vendor approval from Indian Oil Corporation Limited (IOCL), reflect a firm built around compliance, calibration discipline, and repeatable reporting — the fundamentals that shipping and industrial clients rely on.
Firm Snapshot
| Legal Structure | Partnership Firm |
| Partners | Mr. Sourav Gupta, Mr. Uday Sarkar |
| Profit & Loss Sharing | 50% : 50% |
| Nature of Business | NDT Service Provider |
| Core Expertise | Shipping NDT |
| Location | North 24 Parganas, West Bengal |
| Approvals | IRS, BV (NDT & TM) |
| Vendor Approval | IOCL |
Leadership
Our Partners
Mr. Sourav Gupta
Partner — 50% Share
Co-owner of D.P. Non-Destructive Testing, jointly responsible for the firm's technical operations, client relationships, and quality standards.
Mr. Uday Sarkar
Partner — 50% Share
Co-owner of D.P. Non-Destructive Testing, jointly responsible for the firm's technical operations, client relationships, and quality standards.
Mission & Vision
Our Mission
- To provide reliable, precise, and safe non-destructive testing services that ensure the integrity of industrial assets.
- To deliver world-class NDT solutions that empower industries, satisfy clients, and safeguard communities.
- To continuously adopt advanced NDT technologies to improve efficiency, accuracy, and sustainability in industrial testing.
- To serve as the trusted partner for Shipping and Industrial NDT services, meeting global standards with excellence.
- To provide international-standard NDT services with fast reporting and cost-effective solutions for our clients.
Our Vision
- To be the most trusted global partner in ensuring safety and quality through advanced NDT solutions.
- Leading the future of industrial safety with innovative NDT technologies.
- Setting global standards in Shipping and Industrial NDT services.
- Delivering world-class NDT services that empower industries and protect lives.
- Building a safer, sustainable industrial world through excellence in NDT.
Certifications & Approvals
Approved for the Standards Our Clients Answer To
Approved
Indian Register of Shipping
Approved for NDT & Thickness Measurement (TM) across seven testing techniques.
Approved
Bureau Veritas
Approved to support classification-driven NDT requirements for shipping clients.
Vendor
Indian Oil Corporation Ltd.
Registered and approved as a vendor for NDT services to IOCL.
NDT Services & Shipping Expertise
Seven IRS-approved testing techniques, applied with particular depth to shipping inspection — hull, structure, piping, and machinery.
Industry Focus
Deep Expertise in Shipping NDT
Shipping NDT is the core of our practice. We carry out inspections for vessels in drydock and afloat, covering hull plating, structural welds, tanks, piping systems, and machinery components, in line with class survey and owner requirements. Our familiarity with IRS and BV documentation and reporting formats means our results integrate smoothly into class survey and vetting processes, reducing delay and rework for our clients.
- Hull plating and structural weld inspection during drydocking and afloat surveys
- Tank and piping thickness surveys for corrosion monitoring and gauging reports
- Weld inspection support for new-build and repair yards
- Machinery and fitting inspection for class and statutory compliance
- Robotic scanning for confined, elevated, or hard-to-access tank and hull areas
IRS-Approved Techniques
Our NDT Services
Ultrasonic Flaw Detection (UFD)
Ultrasonic Flaw Detection uses high-frequency sound waves to identify sub-surface defects such as cracks, laminations, and weld discontinuities without damaging the component. It is one of our most widely deployed techniques for weld and structural inspection, supported by 5 dedicated Ultrasonic Flaw Detector machines.
Liquid Penetrant Testing (LPT)
Liquid Penetrant Testing reveals surface-breaking defects — cracks, porosity, and seams — on both ferrous and non-ferrous materials. A penetrant dye is applied, drawn into any surface discontinuity by capillary action, and made visible under a developer, giving a clear, low-cost method for surface integrity checks.
Magnetic Particle Testing (MPT)
Magnetic Particle Testing detects surface and near-surface flaws in ferromagnetic materials by inducing a magnetic field and applying fine magnetic particles that gather at defect locations. It is fast, repeatable, and well suited to weld toe and fillet inspection, supported by our fleet of 3 magnetic yokes.
Radiography Testing (RT)
Radiography Testing uses X-ray or gamma radiography to produce a permanent film or digital record of a component's internal condition, revealing volumetric defects such as porosity, slag inclusion, and lack of fusion in welds and castings — providing documented evidence for critical joints.
Phased Array Ultrasonic Testing (PAUT)
Phased Array Ultrasonic Testing is an advanced form of ultrasonic inspection using multi-element probes to steer and focus sound beams electronically. It delivers detailed cross-sectional imaging of welds and materials, improving defect sizing and characterisation over conventional UT, using our dedicated PAUT machine.
Ultrasonic Thickness Gauging (UTG)
Ultrasonic Thickness Gauging measures remaining wall thickness in plates, pipes, and tanks — essential for corrosion monitoring, hull condition assessment, and life-extension surveys. Backed by 6 thickness gauge units, we support both spot checks and full survey grids.
Robotic Scanning with Thickness Measurement
Robotic Scanning combines a crawler-mounted scanning unit with ultrasonic thickness measurement to inspect large, elevated, or confined surfaces — such as tank walls and hull sections — without staging or confined-space entry, improving both safety and coverage speed.
Not Sure Which Technique You Need?
Share your component, structure, or vessel details and our engineers will recommend the right method or combination.
Discuss Your RequirementApproval Reference
IRS & BV-Approved Technique Summary
| # | Technique | Abbreviation | Approving Body |
|---|---|---|---|
| 01 | Ultrasonic Flaw Detector | UT | IRS |
| 02 | Liquid Penetrant Testing | PT | IRS |
| 03 | Magnetic Particle Testing | MT | IRS |
| 04 | Radiography Testing | RT | IRS |
| 05 | Phased Array Ultrasonic Testing | PAUT | IRS |
| 06 | Ultrasonic Thickness Gauging | UTG | IRS |
| 07 | Robotic Scanning with Thickness Measurement | RS+TM | IRS |
| # | Technique | Abbreviation | Approving Body |
|---|---|---|---|
| 01 | Ultrasonic Flaw Detector | UT | BV |
| 02 | Liquid Penetrant Testing | PT | BV |
| 03 | Magnetic Particle Testing | MT | BV |
| 04 | Radiography Testing | RT | BV |
| 05 | Ultrasonic Thickness Gauging | UTG | BV |
Approvals & Certifications
Independently approved by classification and vendor authorities that shipping and industrial clients recognise.
Approved
Indian Register of Shipping (IRS)
D.P. Non-Destructive Testing is approved by the Indian Register of Shipping for Non-Destructive Testing (NDT) and Thickness Measurement (TM) services, covering the following techniques:
- Ultrasonic Flaw Detector (UT)
- Liquid Penetrant Testing (PT)
- Magnetic Particle Testing (MT)
- Radiography Testing (RT)
- Phased Array Ultrasonic Testing (PAUT)
- Ultrasonic Thickness Gauging (UTG)
- Robotic Scanning with Thickness Measurement
Approved
Bureau Veritas (BV)
D.P. Non-Destructive Testing is also approved by Bureau Veritas for NDT & TM services, allowing us to support classification survey and vetting requirements for vessels under BV class, alongside our IRS approval, covering the following techniques:
- Ultrasonic Flaw Detector (UT)
- Liquid Penetrant Testing (PT)
- Magnetic Particle Testing (MT)
- Radiography Testing (RT)
- Ultrasonic Thickness Gauging (UTG)
Vendor
Indian Oil Corporation Limited (IOCL)
We are a registered and approved vendor to Indian Oil Corporation Limited for the supply of NDT services, reflecting our capability to meet the technical and documentation standards required by a major public-sector client.
Why This Matters
Approvals That Shorten Your Survey Cycle
Working with an IRS & BV approved NDT provider means inspection reports are prepared in formats and to standards these bodies already recognise — reducing queries, re-inspection, and delay during class surveys, vetting inspections, and audits. Our IOCL vendor approval further reflects the documentation discipline we bring to every job, shipping or industrial.
Note for Site Administrator
This section is reserved to display scanned copies of the IRS, BV, and IOCL approval certificates and official logos once supplied. Recommended: PDF or high-resolution PNG/JPG of each certificate, plus the official IRS, BV and IOCL logo marks (used with permission), sized consistently at approx. 200×200px.
Equipment & Team Resources
A calibrated equipment fleet and a qualified technical team, sized to handle multiple concurrent assignments.
Equipment Fleet
Machines & Instruments
| Equipment | Technique Supported | Quantity |
|---|---|---|
| Ultrasonic Flaw Detector Machines | Ultrasonic Flaw Detection (UT) | 5 |
| Magnetic Yokes | Magnetic Particle Testing (MT) | 3 |
| Phased Array Ultrasonic (PAUT) Machine | Phased Array Ultrasonic Testing | 1 |
| Ultrasonic Thickness Gauge Machines | Ultrasonic Thickness Gauging (UTG) | 6 |
| Robotic Scanner | Robotic Scanning with Thickness Measurement | 1 |
Team Strength
Our Technical Team
Trained and experienced technicians carrying out field inspection across all seven approved techniques.
Qualified engineers overseeing technical planning, procedure review, and reporting for each assignment.
Capacity
Sized for Concurrent, Multi-Technique Assignments
Our fleet of 5 Ultrasonic Flaw Detectors, 6 Thickness Gauges, 3 Magnetic Yokes, 1 PAUT unit, and 1 Robotic Scanner — supported by 7 technicians and 3 engineers — allows us to run multiple inspection streams in parallel, whether across different areas of a single vessel or across separate client sites.
Discuss Your Manpower & Equipment Needs →Clients & Work Experience
A running record of the clients we serve and the projects we deliver. Every section below is written to be updated easily as new work is completed.
Our Clients
Clients We've Worked With
Replace the placeholder names with real client names as engagements are confirmed. Group by sector if the list grows long (Shipping / Industrial / PSU).
Project Experience
Work Experience
Fill in real project details (client name may be withheld where confidential — use sector/vessel type instead).
| Project / Vessel | Client | Technique(s) Used | Location | Period |
|---|---|---|---|---|
| Project / Vessel Name | Client Name | UT, MT | Kolkata Port | MM/YYYY |
| Project / Vessel Name | Client Name | UTG, RS | Haldia | MM/YYYY |
| Project / Vessel Name | Client Name | RT, PAUT | Location | MM/YYYY |
| + Add project row | — | — | — | — |
Project Gallery
Project Photos
Recommended: landscape JPG/PNG, at least 1200×900px, showing inspection in progress, equipment set-up, or completed reports (avoid confidential markings unless cleared by the client).
1200 × 900px
Project Title
1200 × 900px
Project Title
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Project Title
Want to Be Our Next Reference Project?
Get in touch to discuss scope, schedule, and reporting for your next inspection.
Start a ConversationSuggestions & Work Satisfaction
A short review from the party we worked for, taken after a completed inspection — your rating and suggestions feed straight into how we run the next job.
Why We Ask
Rate the Work, Tell Us How to Improve
Every inspection is closed out with a short review from the party (client) we worked for. It takes under two minutes and feeds directly into our internal quality review — no login required.
Quality of Work
Accuracy of findings, calibration discipline, and clarity of the final report.
Timeliness
Arrival on schedule, and reports delivered within the agreed window.
Safety Compliance
PPE, site protocol, and permit-to-work discipline on site.
Communication
Coordination with your site team before, during, and after the job.
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Party Review
Submit Your Feedback
Party Review
Recent Feedback
Only publish a party's feedback with their consent; keep vessel/project references generic where confidentiality applies.
"Thorough UT survey, clear reporting, and the crew kept to schedule despite a tight vessel turnaround."
Client Name
"Good technical depth on the PAUT scan; would like slightly faster report delivery next time."
Client Name
"Safety protocol on site was strictly followed, and communication with our team was excellent throughout."
Client Name
Contact Us
Reach out for inspection scheduling, quotations, or general enquiries — we typically respond within one business day.
Get in Touch
Office & Contact Details
Registered Office
Barakanthalia, Majherpara,
North 24 Parganas,
West Bengal – 700121, India
Phone / WhatsApp
Business Hours
Monday – Saturday, 9:30 AM – 6:30 PM IST
(Emergency inspection calls attended beyond hours)
Barakanthalia, Majherpara, North 24 Parganas, W.B. – 700121
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