Overview
EN ISO 15614-10:2005 - "Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 10: Hyperbaric dry welding" defines how to qualify welding procedure specifications (WPS) for welding performed in hyperbaric dry environments (pressurized chambers/habitats). The standard specifies minimum testing and documentation required to validate welding procedures used at depth, and it supports qualification of mechanized and automated hyperbaric dry welding.
Key topics and technical requirements
- Scope and purpose: Qualification of welding procedures for dry hyperbaric welding; minimum testing required for WPQR issuance.
- Preliminary WPS (pWPS): pWPS must follow ISO 15609-1 and include hyperbaric-specific parameters such as water depth, gas composition in the hyperbaric chamber, partial pressure of oxygen, temperature range, relative humidity, and methods for measuring heat input/deposition rate. Consumables handling and contamination controls are required.
- Test pieces and welding tests: Test welds must represent production joints and be carried out under simulated or actual site conditions at the appropriate water depth. Test-piece shape/dimensions reference ISO 15618-2; pipeline tests use pipe sections.
- Examination and testing: Both non‑destructive testing (NDT) and destructive testing are required. Testing extent and specimen location follow ISO 15618-2 for steel structures and EN 288-9 for pipelines.
- Witnessing and examiners: Welding and testing shall be witnessed by an appointed examiner or examining body; external independent examiners may be required.
- Range of qualification and WPQR: The standard defines limits and ranges for which the qualified procedure applies and requires a Welding Procedure Qualification Record (WPQR) documenting results and limitations.
- Process coverage: Applicable to manual, mechanized, and automated hyperbaric dry welding processes.
Applications and practical value
- Used to qualify procedures for offshore and subsea fabrication, repair in pressurized caissons, pipeline tie-ins, and submerged structure maintenance where dry hyperbaric environments are used.
- Valuable for welding engineers, quality managers, procedure writers, and certification bodies to ensure safe, repeatable weld quality at depth.
- Helps operators control risks associated with gas atmosphere, oxygen partial pressure, humidity, and consumable contamination in hyperbaric chambers.
Who should use this standard
- Welding engineers and inspectors, welder-divers and hyperbaric welding operators, offshore contractors, fabrication yards, and notified examining bodies responsible for procedure qualification and certification.
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