Overview
ISO 12736-3:2023 provides project-specific requirements for the qualification, production, application and repair of wet thermal insulation systems used on pipelines and subsea equipment. Part 3 of the ISO 12736 series focuses on interfaces between systems, including field joint systems, on-site repairs and pre-fabricated insulation intended to operate submerged in seawater. The standard defines the processes, testing and documentation needed to demonstrate that field-applied and pre-fabricated wet insulation meets project requirements.
Scope highlights
- Applies to wet thermal insulation systems submerged in seawater.
- Covers product and process qualification for field joints, interfaces, field repairs and pre-fabricated insulation.
- Explicitly excludes project qualification of anticorrosion coatings and insulation in the annulus of steel pipe-in-pipe systems.
Key topics and technical requirements
The standard structures project qualification and inspection around a set of practical elements:
- Material classes and interface types - classification of materials and identification of interface scenarios relevant to field joints and pre-fab modules.
- Project-specific qualification processes - requirements for purchase order information, production qualification, procedure qualification trials, pre-production trials and production testing.
- Application procedures and operator qualification - specification of application procedure documents, inspection and testing plans (ITPs), and competency requirements for personnel carrying out field joints or repairs.
- Production testing, inspection and traceability - material and system tests, inspection documentation and guidance for generating ITPs.
- Field repairs and repair materials - defect characterization, compatibility of repair materials per material class, repair execution and documentation.
- Pre-fabricated insulation - manufacturing control, leak testing, repair methods for prefabricated modules and installation guidance.
- Handling, storage and transportation at site - requirements to preserve performance prior to installation.
- Informative annexes - guidance on using the document, design of field joint systems, adhesion testing, pre-fabrication guidance and leak testing.
Practical applications and users
ISO 12736-3:2023 is intended for organizations involved in subsea thermal insulation projects:
- Operators and asset owners specifying qualification criteria in procurement.
- EPC contractors and engineering consultancies developing project qualification plans and ITPs.
- Insulation system manufacturers and fabricators performing production qualification, pre-fab manufacture and factory tests.
- On-site installers and inspection bodies executing field joint applications, repairs and verification testing.
- Quality assurance teams ensuring traceability, documentation and conformance to project requirements.
Using ISO 12736-3 helps reduce project risk, ensure repeatable field application quality, and align suppliers and contractors on test and documentation expectations for subsea wet thermal insulation.
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