QA/QC › Drainage & Sewerage › Sewer Pipe Laying

Form · QC-DRN-FRM-001

Sewer Pipe Laying Method Statement

5 checkpoints across 2 sections. Before sewer pipe laying

5 Checkpoints

2 Sections

Per phase

Site Engineer

S.No.	Checkpoint	IS Requirement
A. INSTALLATION PROCEDURE
A1	Step 1: Trench excavated to design depth with sand cushion (100mm) placed Acceptance: Trench ready, sand layer in place	Cl. 5 — Preparation
A2	Step 2: Pipes laid on sand, joints made with mortar, benching in manholes Acceptance: Pipes installed, joints completed, invert level correct	Cl. 6 — Laying
A3	Step 3: Support layer (150mm sand) placed over pipes; backfill soil added in 200mm lifts Acceptance: Support and backfill completed, compacted	Cl. 7 — Backfilling
A4	Step 4: Water test (30 minutes hold) and smoke test performed; defects repaired Acceptance: Tests passed, zero leakage, ready for service	Cl. 10-11 — Testing
B. SAFETY MEASURES
B1	Work site secured, trench properly shored for depth >1.5m, PPE provided to workers Acceptance: All safety measures in place, no incidents	Cl. 12 — Safety

A. INSTALLATION PROCEDURE

A1Step 1: Trench excavated to design depth with sand cushion (100mm) placed

Cl. 5 — Preparation (IS 4127)

✓ Trench ready, sand layer in place

A2Step 2: Pipes laid on sand, joints made with mortar, benching in manholes

Cl. 6 — Laying (IS 4127)

✓ Pipes installed, joints completed, invert level correct

A3Step 3: Support layer (150mm sand) placed over pipes; backfill soil added in 200mm lifts

Cl. 7 — Backfilling (IS 4127)

✓ Support and backfill completed, compacted

A4Step 4: Water test (30 minutes hold) and smoke test performed; defects repaired

Cl. 10-11 — Testing (IS 4127)

✓ Tests passed, zero leakage, ready for service

B. SAFETY MEASURES

B1Work site secured, trench properly shored for depth >1.5m, PPE provided to workers

Cl. 12 — Safety (IS 4127)

✓ All safety measures in place, no incidents

Inspection Sign-Off

APPROVED

APPROVED WITH MODS

REJECTED

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Name / Sign / Date