| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. DELIVERY & DOCUMENTATION | |||
| A1 | Purchase Order vs Delivery Challan Matching Acceptance: Challan references PO; pipe type, size, length, grade match; quantity ±2% | Verify material matches ordered specification | OK NC NA HOLD |
| A2 | Manufacturer Certificate & Lab Testing Data Acceptance: ISI mark present; test certificate from accredited lab; batch number traceable | Verify supplier quality credentials | OK NC NA HOLD |
| A3 | Pipe Classification (Class A/B/C, PN rating if applicable) Acceptance: Class (A=10kg/cm², B=6kg/cm², C=3kg/cm²) clearly marked on pipe | Confirm pressure class for application | OK NC NA HOLD |
| A4 | Manufacturing date verification (Not >2 years old) Acceptance: Pipes manufactured within 24 months; date marked on pipe; checked visually | Verify material is not aged beyond acceptable limit | OK NC NA HOLD |
| B. QUANTITY & DIMENSION VERIFICATION | |||
| B1 | Piece count verification (sample counting first 10%) Acceptance: Count matches challan ±1 piece; recorded | Verify count accuracy | OK NC NA HOLD |
| B2 | Pipe length measurements (sample 5 pieces per size) Acceptance: Length ±5 mm of nominal; deviation recorded in cm | Verify cutting accuracy | OK NC NA HOLD |
| B3 | Outside diameter measurement (micrometer, 3 points per pipe) Acceptance: OD within ±0.5% of nominal or ±1 mm (whichever is greater) | Verify pipe OD within tolerance | OK NC NA HOLD |
| B4 | Wall thickness check (sample pipes, measured with calipers) Acceptance: Thickness within -0% to +10% of nominal per IS 4985 Table 2 | Ensure structural adequacy | OK NC NA HOLD |
| C. VISUAL QUALITY INSPECTION | |||
| C1 | Surface cracks, splits, or mechanical damage Acceptance: No cracks >1 mm length, no splits, no dents >5% diameter depth | Assess structural integrity | OK NC NA HOLD |
| C2 | Color consistency and discoloration checks Acceptance: Uniform color per material type (UPVC white/grey, HDPE blue/black); no fading | Verify material quality | OK NC NA HOLD |
| C3 | Surface finish smoothness (no pits, bubbles, rough spots) Acceptance: Smooth surface; no pits or bubbles >1 mm diameter on external surface | Assess external quality | OK NC NA HOLD |
| C4 | Straightness check (lay on flat surface, measure bow) Acceptance: Bow ≤ 5 mm per 1 m length for straight pipes | Ensure pipe linearity for installation | OK NC NA HOLD |
| C5 | Internal surface condition (visual inside with torch/mirror) Acceptance: Clean interior; no debris, dirt, or foreign material visible | Verify internal cleanliness | OK NC NA HOLD |