This content provides you with a draft Fitting Inspection and Test Plan and a guide for fitting vendor inspection. You need to change this ITP based your purchase order specification and requirements.
| Fitting Inspection and Test Plan Task | Vendor | TPI Inspection | Client |
|---|---|---|---|
| Mill test reports(incl.heat treatment records,etc.) | H | R | R |
| Non-destructive testing (RT, UT, MT or PT) (Review of all radiographs films) | H | R | R |
| Heat treatment execution, if specified | H | W | R |
| Metallographic examination, if applicable | H | W | R |
| Visual and dimensional control | H | W | R |
| Hydrostatic test, if applicable | H | H | R |
| Painting, coating, marking and color coding check | H | W | R |
| Final visual inspection including packaging and quantity control | H | H | R |
| Documentation review prior to release(Final activity of Technical Inspection) | H | H | R |
| Pre-shipment Inspection | H | H | R |
H: Hold Point implies that relevant production activities shall not proceed until the continuation of work is permitted by Purchaser. (Notification req'd)
W: Witness point implies that Purchaser intends to witness the designated inspection feature. If Purchaser decides not to witness the relevant feature, production can proceed without permission of Purchaser. (Notification req'd)
R: Review inspection & test records (Notification not req'd)
The selecting hold, point and witness points depend to the fitting purchasers. They decide based on the fitting vendor pre-qualification assessment results their inspection budget, local regulatory requirement, etc.
You must add two or three more columns in above table, one for identification of the construction and manufacturing code or specification, second one for acceptance criteria. The value of the acceptance criteria is different from one construction code to other one.
Following table is a guide for assigning inspection level for fitting vendor inspection.
| Fitting Material | Schedule | Size | Inspection Grade |
|---|---|---|---|
| Carbon Steel Fitting | <80 | ≤10" | D |
| Carbon Steel Fitting | <80 | >10" | C |
| Carbon Steel Fitting | ≥80 | ≤10" | C |
| Carbon Steel Fitting | ≥80 | >10" | B |
| Low alloy & Stainless Steel Fitting | <80 | ≤10" | C |
| Low alloy & Stainless Steel Fitting | <80 | >10" | B |
| Low alloy & Stainless Steel Fitting | ≥80 | ≤10" | B |
| Low alloy & Stainless Steel Fitting | ≥80 | >10" | A |
| Special Fitting | <80 | ≤10" | B |
| Special Fitting | <80 | >10" | B |
| Special Fitting | ≥80 | ≤10" | A |
| Special Fitting | ≥80 | >10" | A |
Class A: Mandatory Involvement during the fabrication; 60 to 100% checking of parts forming the batch to be inspected (minimum one piece)
Class B: Optional involvement during the fabrication; 25% to 60% checking of parts forming the batch to be inspected. (minimum one piece)
Class C: 10 to 25% random inspection of the parts forming the batch for which the definition is given by the standard of the product (minimum one piece
Class D: 0 to 10% random inspection of the parts forming the batch for which the definition is given by the standard of the product (minimum one piece)
NOTE: The Extent of Inspection Depends on Order's Quantity, Vendor QC Evaluation at Job Stage and/or any nonconformity is raised during inspection
If you have purchased the fittings that have already been manufactured then witnessing of some tests will not be possible. In this case your third party inspection agency must precisely check the manufacturer quality control records.