Codes, Standards and Legal/Contractual Responsibilities
Domain 8: Codes, standards and legal/contractual responsibilities
This domain tests how standards and contracts allocate responsibility. The exam expects you to know which document governs what, and who must sign or approve.
Standards framework
ISO 3834 specifies quality requirements for fusion welding: part 2 comprehensive, part 3 standard, part 4 elementary. ISO 14731 defines welding coordination tasks and the need for a responsible welding coordinator. EN 1090 covers execution of steel structures and defines execution classes EXC1 to EXC4, with increasing requirements for procedures, qualification and inspection. EN ISO 15614 covers procedure qualification and ISO 9606 covers welder qualification; ISO 9712 covers NDT personnel certification. The Pressure Equipment Directive 2014/68/EU imposes essential safety requirements and conformity assessment for pressure equipment.
Contractual responsibility
A specification can be stricter than a standard but cannot replace a legal requirement. The contract defines acceptance criteria, documentation, inspection rights and warranties. The welding coordinator's responsibility cannot be transferred by signature alone; the manufacturer remains responsible for conformity.
Worked example
A steel structure is ordered to EN 1090-2, execution class EXC2. The manufacturer must hold appropriate factory production control, use qualified procedures and welders, and have a welding coordinator with the required competence. If the client asks for EXC3, the inspection and NDT regime tightens; the same WPS may be usable, but the evidence package must meet the higher class. The trap is to assume an EXC2 certificate automatically covers EXC3 work.
Traps
Quoting a standard as if it were a contract. Confusing ISO 3834 parts. Assuming CE marking transfers all responsibility to the certifier. Ignoring notified-body involvement where the directive requires it.