PRODUCTION · METHOD STATEMENT · AR/MS-001

Method Statementبيان الطريقة

Cryogenic PIR insulation installation on process pipe rack — per SAES-Q-009 + GI 6.029

Project{{project_name}}

Doc RefVAA-MS-{{seq}}

Rev0 · {{date}}

StatusFOR APPROVAL

Approvals matrix · مصفوفة الاعتمادات

Stage	Name	Role	Signature	Date
Prepared	{{prep_name}}	Sr Insulation Engineer	__________	____
Checked	{{check_name}}	QA/QC Lead	__________	____
Approved (Vinn)	{{vinn_pm}}	Project Manager	__________	____
Approved (Client)	{{client_rep}}	Client Representative	__________	____

1 · Scope of work · نطاق العمل

This method statement covers the cryogenic PIR insulation installation across the following process pipe systems within {{project_name}}: pipe diameters NPS 2"–48", service temperature range −150 °C to −42 °C, line numbers per attached ISO drawings IS-{{drawing_no}}, total estimated 8,400 m² of insulation surface plus 220 cold pipe shoes and 180 spring hangers.

يغطّي بيان الطريقة هذا تركيب عزل PIR التبريدي على أنظمة الأنابيب التالية ضمن {{project_name}}: أقطار NPS 2"–48"، درجة خدمة −150 إلى −42°م، أرقام الخطوط وفق رسومات ISO المرفقة، إجمالًا 8,400 م² عزل + 220 دعامة باردة + 180 معلّق نابض.

2 · Reference standards · المعايير المرجعية

SAES-Q-009 · Insulation for cryogenic service (Aramco Engineering Standard)
GI 6.029 · General Instructions — Cold work / cryogenic handling
ASME B31.3 · Process Piping
MSS SP-58 · Pipe Hangers and Supports
ASTM C518 · Thermal conductivity testing · C411 · D1622 · D1623 · E96
Project specification {{project_spec_ref}} (latest revision)

3 · Equipment, tools, materials · المعدّات والمواد

Equipment + tools

Scaffolding (BSC-certified, daily inspected)
Pneumatic foam saws, hot knives, hand saws
Caulking guns + trowels for mastic application
Aluminum jacket sheet metal brake + rivet guns
Thermometer / RH meter / calibration certs

Materials (per TDS in datasheet pack)

PIR slab VAA-PIR-001 (density 60-100 kg/m³)
Vapor barrier mastic VAA-VB-002 + fiberglass scrim
Aluminum jacket 0.6mm (or alloy 0.8mm where marine)
Cold shoes VAA-CS-001 (NPS-specific)
Spring hangers VAA-SH-001 (load-specific)

PRODUCTION · METHOD STATEMENT · PAGE 02

4 · Personnel and roles · الفريق والأدوار

Role	Count	Certification required
Foreman / Supervisor	1	NEBOSH IGC + 10 yrs cryogenic insulation
Sr Insulation Engineer	1	Saudi-licensed PE + ARAMCO-certified applicator
Insulation operators	12	Vinn Internal Cert (3-month induction)
Welder (jacket seams)	2	ASME Section IX qualified · 6G position
QC Inspector	1	CSWIP + ARAMCO QC qualified
HSE Officer	1 (24/7)	NEBOSH + Saudi HSE Council registered

5 · Step-by-step procedure · الإجراء خطوة بخطوة

Site walk-down — Verify ISO drawings against as-built piping. Confirm line numbers, sizes, supports. Photograph initial state.
Scaffolding — Erect BSC-certified scaffolding. Daily inspection by competent person. Green-tag before any work commences.
Pipe surface preparation — Wire-brush + solvent-degrease. Verify no residual chloride contamination (per SAES-Q-009 §5.2). Photograph surface.
Cold shoe + spring hanger placement — Position per ISO. Bolt to structural supports. Apply hot/cold load preset on spring hangers (do not remove travel pin yet).
PIR slab cutting + adhesive application — Slabs cut to template. Adhesive applied per TDS (2-3mm coverage, no skinning). Press-fit on pipe with no air gaps.
Slab installation — First layer staggered joints, second layer (where ≥75mm total thickness) joints offset 90°. Maximum cell void 5%.
Joint sealing — Mastic + scrim at all longitudinal + circumferential joints. Cure 24h minimum before jacket.
Vapor barrier — Mastic 1.2-1.5mm + reinforcing scrim, lapped 50mm minimum at joints. ASTM E96 permeance ≤ 1.0 perm.
Aluminum jacket cladding — Sheet metal brake-formed on site. Pop-rivet seams at 75mm centers. Overlap 50mm. Sealant under all rivets.
QC inspection — Per ITP hold-points. Visual + tactile + dimensional + thermography (post-commission). NCR raised within 24h of detection.
Pressure test / leak test — Where required by service. Witnessed by client representative.
Thermal-soak commissioning — Pull travel pins on spring hangers ONLY after system at operating temperature.
As-built drawings + handover — Mark-up red-line ISOs, photographic record, MTR pack, ITP sign-off pack, final walk-down with client.

PRODUCTION · METHOD STATEMENT · PAGE 03

6 · HSE controls · ضوابط السلامة

Permit-to-Work required for ALL of the following Hot work (jacket welding / soldering) · Working at heights ≥ 2m · Confined space entry · Cold work in cryogenic-active zones · Electrical isolation work.

Hazard category	Control measures	PPE
Working at heights	BSC scaffold · daily green-tag · 100% tie-off above 1.8m	Harness + lanyard + helmet
Hot work (jacket weld)	Fire watch posted 30 min after · permit + gas test · flammables 10m radius cleared	FR coverall + welding shield + gloves
Manual handling	Slab cuts ≤ 15 kg per piece · 2-person lift for >15 kg · mechanical aid for >25 kg	Cut-5 gloves + safety boots
Heat stress (Saudi summer)	Work-rest cycle per WBGT · Ramadan shifts adjusted · 1L water/hr/person provided	Light FR + ventilated helmet
Chemical exposure (adhesive vapors)	Outdoor only or forced ventilation 6 ACH · MSDS reviewed pre-shift	Cartridge respirator A2 + nitrile gloves
Cold work near cryogenic-active	Cold isolation confirmed · permit-to-work · standby man-watch · communication radio	Insulated gloves + face shield

7 · QA checks (per ITP) · الفحوصات

Material receipt + batch verification against MTR (Hold)
Surface prep visual + chloride test ≤ 5 ppm (Hold)
Insulation slab installation visual + air-gap check (Witness)
Joint sealing + mastic thickness (Witness)
Vapor barrier permeance verification (Review)
Jacket cladding overlap + rivet pattern (Witness)
Pressure test (Hold — client witness)
Thermal imaging post-commissioning (Review)
Final walk-down + punch list (Hold)

8 · Emergency procedures · إجراءات الطوارئ

Emergency contacts (post at every work zone) Civil Defence — 998 · Police — 999 · Ambulance / Red Crescent — 997
Site HSE Officer — {{hse_phone}} · Vinn Site Supervisor — {{supervisor_phone}}
Vinn Plant Clinic — +966 13 XXX XXXX ext 312 · Vinn MD office — ext 200

Drawings + sketches referenced: ISO-{{drawing_no}}, sketch SK-{{sketch_no}}. Method statement supersedes verbal instructions. Any deviation requires written change order approved per the Approvals matrix on Page 01. All site personnel acknowledge this MS in the daily Toolbox Talk on day 1. يتجاوز بيان الطريقة التعليمات الشفهية. أي انحراف يتطلّب أمر تغيير خطي معتمد. يقرّ كل فريق الموقع بهذا البيان في اللقاء الأمني اليومي.