HDPE Pipeline
Inspection & Test Plan

Document number	DTL-PRJ0072-ITP-001
Revision	A — Issued for Approval
Date	16 July 2026
Parent	DTL-PRJ0072-QMP-001 Quality Management Plan, Section 4
Standards	AS/NZS 4130 · approved fusion parameters (DTL-HDPE-TEM-0003)
Attention	Mr John Stephens — Principal Representative

DRAFT for engineering & SBR review. Hold and witness points and acceptance criteria are proposed from AS/NZS 4130 and DTL practice. SBR to elect its witness/hold points in the “SBR” column before the plan is issued for construction.

DTL (WA) Pty Ltd · 2/28 Horus Bend, Bibra Lake WA 6163 · ABN 45 677 646 454 · Commercial-in-Confidence

DTL (WA) Pty Ltd · Commercial-in-ConfidenceContract SBS10627 · PO 182113Page 1 of 4

HDPE Inspection & Test PlanBitterns Recycling Project — Field Piping Installation

DTL-PRJ0072-ITP-001
Rev A

1HDPE inspection & test points

H Hold — work stops until released W Witness — attend if elected R Record only REF section

No.	Activity	Acceptance criteria	Reference	Record	DTL H/W
1.0	Material receival & storage				REF
1.1	Delivery inspection	Pipe/fittings free of transit damage, gouges >10% wall, UV degradation.	AS/NZS 4130	Receival log	H
1.2	Certification check	CoC & AS/NZS 4130 compliance certificate present; batch/heat recorded.	SOW MDR	Traceability record	H
1.3	Storage	Supported, shaded, no point loads; UV protection if >12 months.	Mfr guidance	—	W
2.0	Butt fusion jointing				REF
2.1	Machine set-up	Correct clamps/inserts; faces aligned; drag pressure recorded.	AS/NZS 4130 App.	Weld register	W
2.2	Heater plate temp	Plate temperature within approved range, verified each shift.	TEM-0003	Heater Plate Check	H
2.3	Fusion parameters	Heat-soak, fusion & cooling times/pressures to approved parameters for size/class.	TEM-0003	Weld register	H
2.4	Bead inspection	Twin uniform beads, correct width, no mismatch >10% wall; cooled undisturbed.	AS/NZS 4130	Weld register	H
2.5	Weld numbering	Each joint numbered and located on the weld map.	QMP §5	Weld map	R
3.0	Installation				REF
3.1	Stringing & alignment	Route, bend radius ≥ mfr minimum, no kinks; support.	Drawing	ITP sign-off	W
3.2	Road crossings / cover	Depth, sleeve/casing and cover to drawing.	Drawing	ITP sign-off	H
3.3	Earth mounding	Profile and compaction to drawing.	Drawing	ITP sign-off	W
4.0	Connections				REF
4.1	Flanged / mechanical joints	Alignment, gasket, bolt torque to spec; connection recorded.	Mfr spec	Connection record	H
4.2	ARV, tie-ins, standpipes, scour	Fit, orientation, function to drawing.	Drawing	ITP sign-off	W
5.0	Testing & handover				REF
5.1	Pressure / leak test	Test pressure, hold time and acceptance to approved test procedure.	AS/NZS 4130 / spec	Test certificate	H
5.2	Weld map complete	All welds mapped and cross-referenced to the register.	QMP §5	Weld map	H
5.3	Records & MDR	All ITP points signed, NCRs closed, MDR compiled.	SOW MDR	MDR	H

DTL (WA) Pty Ltd · Commercial-in-ConfidenceContract SBS10627 · PO 182113Page 2 of 4

HDPE Inspection & Test PlanBitterns Recycling Project — Field Piping Installation

DTL-PRJ0072-ITP-001
Rev A

2How this ITP is used

Work at each numbered point is inspected/tested against the acceptance criteria before proceeding.
Hold points (H) stop the work until signed off. Witness points (W) allow SBR to attend; work may proceed if SBR elects not to attend, provided the point is recorded.
Results are recorded on the named record and signed by DTL; SBR signs where it elects a hold/witness point.
A non-conformance is raised (DTL-QA-PRO-0001), dispositioned and closed before the affected work is released.
All completed ITP records form part of the Manufacturers Data Report.

SBR to complete the “SBR H/W” column at the QMP/ITP review, nominating which points it will hold or witness. DTL will re-issue the ITP as “Issued for Construction” once agreed.

Acceptance & sign-off

PREPARED — DTL

Tyson Knight

Director · Date

ACCEPTED — SBR

Principal Representative · Date

DTL (WA) Pty Ltd · Commercial-in-ConfidenceContract SBS10627 · PO 182113Page 3 of 4

HDPE PipelineInspection & Test Plan

1HDPE inspection & test points

2How this ITP is used

Acceptance & sign-off

HDPE Pipeline
Inspection & Test Plan