The Certificate of Inspection or inspection certificate article provides information about the third party inspection agency inspection certificate requirements.
This is named third party inspection certificate or third party inspection certificates for goods.
The third party inspection company issues inspection certificate after inspection and when the goods shipped to the buyer premises.
We recommend you review Pre-Shipment Inspection article first, we will wait for you here.
As mentioned in above article, when there is LC between buyer and seller, the inspection certificate content and wording must be in accordance clause 46.A in the LC, otherwise the buyer and seller bank will reject the certificate and purchase fund will not be negotiated.
Generally LCās mandate the inspection certificate issued after the B/L (Bill of Lading), it means the certificate of inspection must be issued when shipment is done and seller or manufacture have no more access to the consignment.
Seller will receive the fund when delivered shipping document and certificate of inspection to its bank.
It means when the goods is in the way and still not arrived to the buyer premises, the seller receive the purchase fund.
This is the advantage of transaction through LC, in this method LC fulfills interest of both parties e.g. buyer and seller.
Which party must receive the inspection certificate?
Either buyer pay for third party inspection fee or seller pay, the ownership of the inspection certificate is the seller. Seller must deliver the certificate to the bank and receive its fund.
Sometimes dispute happen between buyer and seller, and buyer asking from third party Inspection Company which not deliver the certificate to the seller.
This is not logical request from Inspection Company, the inspection company must be independent and if there is no discrepancy in the inspection must issue the certificate and deliver to the seller.
For more detail review Third Party Independent Inspection article.
The following items are included in the content of the certificate of Inspection:
- Applicant :(The name of buyer company which has opened the LC)
- Consigned to the Order of š The name of the LC opened bank or buyer bankās)
- Beneficiary: (The name of the seller)
- LC No. and LC Date
- Custtom Tariff Code No.
- Proforma Invoice No. and Date
- Purchase Order No. and Date
- Insurance Policy No.
- Country of Origin
- Place of Inspection
- Date of Inspection
- Scope of Inspection
- Port of Discharge
- Type of Packing
- Number of Packages
- Description of Goods (with reference to the packing list number and Date)
- Bill of Lading No. and Date
- Gross weight
- Conclusion (as per LC, 46.A clause , if even there is syntax error in the LC should not be corrected)
- Name and Signature of Authorized Person
- Place and Date of Issue
The following wording also is stated in the inspection certificate to protect and indemnify Third Party Inspection Company
“This inspection has been performed at the time and place of inspection and within the limitation of instructions received but without prejudice and without releasing suppliers and/or shippers and/or other parties involved from their contractual obligations nor does it prejudice buyer’s right of claim towards sellers/suppliers for compensation of any apparent and/or hidden defects not detected during our random inspection or occurring thereafter. It is also subject to “General Terms & Conditions of Inspection servicesā.
Executive Summary & Industrial Inspection Scope
In demanding industrial environments across Oil, Gas, Petrochemical, Offshore, and Heavy Process Infrastructure, rigorous compliance with ISO 9001 / ASME / API is essential to ensure operational integrity, personnel safety, and compliance with statutory regulatory frameworks. This technical specification provides QA/QC managers, procurement engineers, welding inspectors, and third-party inspection (TPI) agencies with an authoritative, field-tested guideline for “Certificate Of Inspection”.
Ensuring compliance regarding certificate of inspection minimizes the risk of catastrophic asset failures, costly unscheduled shutdowns, and supplier non-conformances. The following technical sections delineate the scope of inspection, mandatory verification protocols, acceptance criteria, documentation deliverables, and root cause mitigation strategies.
Governing International Engineering Codes & Specifications
Verification and validation of Certificate Of Inspection must strictly conform to the latest editions of the following international engineering codes and project specifications:
ā¢ **Primary Standard Reference:** ISO 9001 / ASME / API
ā¢ **Quality Management & Inspection Systems:** ISO 9001:2015 & ISO/IEC 17020 (Requirements for the operation of various types of bodies performing inspection)
ā¢ **Material Compliance & Traceability:** EN 10204 Type 3.1 / 3.2 Inspection Certificates for metallic and non-metallic pressure-retaining components
ā¢ **Personnel Qualification:** ASNT SNT-TC-1A / ISO 9712 for NDT personnel, CSWIP 3.1 / AWS CWI for welding inspection, and NACE / AMPP Level 2/3 for coating and corrosion personnel
ā¢ **Statutory & Health Safety Directives:** ASME Boiler & Pressure Vessel Code (BPVC), API Standards, OSHA, and regional local authority regulations.
Step-by-Step Quality Control & Inspection Procedure
The execution of quality surveillance for Certificate Of Inspection is structured across four progressive QA/QC intervention phases:
Stage 1: Pre-Inspection & Engineering Document Review (Review Point – R)
Prior to commencement of any physical activities or manufacturing operations related to Certificate Of Inspection, the contractor or vendor must submit all technical submittals to the Owner or TPI agency for formal review and approval.
- Verification of approved Inspection and Test Plan (ITP) identifying all Hold (H), Witness (W), Review (R), and Surveillance (S) intervention points.
- Cross-examination of Material Test Reports (MTR / Mill Certificates) against standard design specifications (ISO 9001 / ASME / API).
- Review and approval of specific Procedure Qualification Records (PQR), Welding Procedure Specifications (WPS), or calibration certificates.
- Verification that all measurement instruments, gauges, and NDT equipment hold valid calibration certificates from ISO/IEC 17025 accredited calibration laboratories (within 6 to 12 months validity).
Stage 2: In-Process Witnessing & Fabrication Control (Witness / Hold Point – W/H)
During the active execution phase, the certified inspector performs physical surveillance to ensure strict adherence to certified drawings, manufacturing procedures, and code tolerances.
- Verification of material traceability (heat number, heat treatment lot, plate number) transferred accurately onto fabricated components.
- Dimensional verification and visual inspection using calibrated gauges, micrometer depth dials, or laser alignment systems.
- Monitoring ambient environmental parameters (relative humidity, dew point, substrate temperature) when applying surface treatments, welding preheat, or pressure testing.
- Witnessing non-destructive examination (RT, UT, MT, PT, PMI) at specified percentages according to project critical rating and code requirements.
Stage 3: Final Acceptance, Pressure/Performance Testing & Marking (Hold Point – H)
The culminating milestone where the fully assembled or completed item is subjected to definitive acceptance tests in the presence of the Owner’s Third-Party Inspector (TPI).
- Execution of pressure proof tests (Hydrostatic at 1.3x to 1.5x MAWP or Pneumatic test) with dual calibrated pressure gauges and temperature recorders.
- Full visual inspection of completed surfaces, welds, protective coatings, and flange contact faces for absence of mechanical damage or code defects.
- Validation of permanent stamping, low-stress die markings, nameplate data verification, and barcoding in strict conformity with project specs.
- Clearing all open punch-list items, non-conformance reports (NCRs), and concession requests prior to issuance of the release note.
Stage 4: Packing, Preservation & Inspection Release (Inspection Release Certificate – IRC)
Ensuring the inspected equipment is adequately protected against atmospheric corrosion, mechanical shock, and marine transit degradation.
- Inspection of rust preventative coatings, desiccant bags, flange face blind protectors, and vapor corrosion inhibitor (VCI) packaging.
- Verification of heavy-lift sea fastening lugs, center-of-gravity markings, and export crating compliance (ISPM 15 wooden crating).
- Compilation and signing of the final Inspection Release Certificate (IRC / Shipping Release) and manufacturer data dossier (MDR).
Technical Acceptance Criteria & Tolerances Matrix
All measurements and physical characteristics must comply with the engineering tolerances and acceptance thresholds tabulated below:
| Inspection Parameter / Test Item | Applicable Standard & Clause | Permissible Tolerance / Acceptance Limit | Verification Method | Intervention Type |
|---|---|---|---|---|
| Material Chemical & Mechanical Verification | ISO 9001 / ASME / API / EN 10204 3.1 | 100% compliance with minimum tensile, yield, elongation, and impact values (Charpy V-Notch at design temp) | Optical Emission Spectrometry (OES) / MTR Verification | Review (R) |
| Visual & Dimensional Tolerances | ISO 9001 / ASME / API / Project Specs | Zero cracks, lack of fusion, severe pitting; dimensional tolerances within Ā±1.0mm to Ā±3.0mm per code drawings | Calibrated Vernier, Bridge Cam, Depth Micrometer | Witness (W) |
| Non-Destructive Examination (NDT) | ASME Sec V / ASNT SNT-TC-1A | 100% compliant with code acceptance criteria; zero planar defects or unpermitted volumetric indications | Radiographic (RT) / Ultrasonic (UT) / Magnetic Particle (MT) | Hold (H) |
| Pressure / Proof Testing (Hydrostatic) | ISO 9001 / ASME / API / ASME Sec VIII | Test pressure maintained for minimum 30 to 60 mins; zero pressure drop, zero leakage or visible sweating | Dual calibrated Bourdon pressure gauges + Chart Recorder | Hold (H) |
| Surface Prep & Protective Coating Quality | SSPC-SP / NACE / ISO 8501 | Surface profile 50 – 75 Āµm; Dry Film Thickness (DFT) within 80/20 rule of specified nominal thickness | Replica Tape (ASTM D4417) & Magnetic Gauge (SSPC-PA 2) | Witness (W) |
| Nameplate & Final Preservation Verification | API / ASME / Client Specs | 316L SS nameplate securely affixed with correct design code, MAWP, design temp, and national board stamping | Physical visual check & VCI preservation verification | Hold (H) |
Mandatory QA/QC Dossier & Inspection Deliverables
Prior to the final issuance of the Inspection Release Certificate (IRC), the contractor and vendor must compile and submit the verified manufacturer data record containing:
- Approved Inspection & Test Plan (ITP) with sign-off stamps by Contractor, Client, and TPI.
- Material Test Reports (MTR / Mill Test Certificates EN 10204 Type 3.1 or 3.2).
- Certified Welding Procedure Specifications (WPS), Procedure Qualification Records (PQR), and Welder Performance Qualifications (WPQ).
- Calibration Certificates for all test instruments and measuring equipment (NABL / ISO 17025 accredited).
- Non-Destructive Examination Reports (RT, UT, MT, PT, PMI, Ferrite Content) evaluated by Level II/III inspectors.
- Heat Treatment & PWHT Time-Temperature Recorder Charts with thermocouple layout drawings.
- Hydrostatic / Pneumatic Pressure Proof Test Certificate with calibrated chart recorder logs.
- Surface Preparation and Protective Coating Inspection Reports (Daily environmental log, blast profile, DFT summary).
- Non-Conformance Report (NCR) and Concession Disposition Closeout Log.
- Official Inspection Release Certificate (IRC / Shipping Release Note) permitting packing and dispatch.
Common Non-Conformances & Field Mitigation Strategies
Based on extensive third-party inspection field records in oil & gas projects, the following deviations require heightened surveillance:
Defect / Hazard: Material Grade Substitution & Lack of Heat Traceability
Root Cause: Uncontrolled workshop storage, missing color coding, or unverified supplier sub-tier procurement without EN 10204 3.1 documentation.
Preventative Action: Enforce strict 100% Positive Material Identification (PMI) prior to cutting, and mandatory material receiving inspection with physical stamping cross-referenced to original mill test certificates.
Defect / Hazard: Out-of-Tolerance Fit-Up & Alignment Mismatch
Root Cause: Poor thermal cutting, thermal distortion from excessive preheat, or inadequate jigging and tacking arrangements.
Preventative Action: Establish a mandatory Witness/Hold point at joint fit-up before root pass deposition. Use calibrated Hi-Lo gauges to verify bevel angle, root face, and root gap according to the qualified WPS.
Defect / Hazard: Premature Coating Delamination & Blistering Under Film
Root Cause: Excessive soluble salt contamination (>20 mg/mĀ²) left on the substrate, blast cleaning below dew point (<3Ā°C above dew point), or oil/moisture in the blasting compressor air line.
Preventative Action: Perform Blotter Test (ASTM D4285) daily on compressed air, enforce Bresle patch chloride testing, and apply primer within 4 hours of abrasive blasting before rust blooming initiates.
Defect / Hazard: Pressure Drop During Final Hydrostatic Proof Testing
Root Cause: Micro-leakage through temporary test flange gaskets, entrapped air pockets inside vessel high points, or inadequate temperature stabilization.
Preventative Action: Ensure thorough venting at all high-point vents until bubble-free fluid emerges, allow minimum 15-minute temperature stabilization between filling medium and ambient metal, and torque all blind flanges with calibrated torque wrenches.
Frequently Asked Questions (FAQ)
Q: What are the mandatory qualifications for inspectors verifying Certificate Of Inspection?
A: Inspectors must hold recognized international certifications applicable to the discipline. For welding and fabrication: CSWIP 3.1/3.2, AWS CWI, or API 510/570 Source Inspector. For NDT: ISO 9712 or ASNT SNT-TC-1A Level II minimum. For coatings: NACE / AMPP Level 2 or FROSIO Level III. Additionally, the inspection agency must operate under an ISO/IEC 17020 accredited quality management system.
Q: How does PtroTek resolve non-conformances (NCRs) encountered during vendor surveillance?
A: When a deviation from certified drawings or ISO 9001 / ASME / API is detected, the inspector issues a formal Non-Conformance Report (NCR) within 24 hours. The vendor must submit a Root Cause Analysis (RCA) and proposed disposition (Rework, Repair, or Concession). Work on the affected component is halted (Hold Point) until the Owner’s engineering authority approves the disposition and a re-inspection confirms full compliance.
Q: What is the difference between Witness (W) and Hold (H) points in an Inspection & Test Plan (ITP)?
A: A Hold Point (H) is a mandatory milestone where fabrication or testing CANNOT proceed without the physical presence of the designated client or third-party inspector. Written clearance or stamping is strictly required. A Witness Point (W) requires prior notification (typically 24 to 48 hours) to the inspector; however, if the inspector fails to attend at the scheduled time, fabrication or testing may proceed with subsequent review of the test records.
Q: Can international clients review inspection reports and photos in real time?
A: Yes. PtroTek provides comprehensive Flash Reports issued within 24 hours of inspection completion, followed by detailed formal inspection reports accompanied by high-resolution calibrated photographic evidence, dimension logs, and signed vendor test records for complete global transparency.
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