Products are inspected / tested throughout various stages of manufacture in order to verify conformance to drawings and specifications, records are kept to confirm conformance of the product inspected.

Inspection and test is carried out in accordance with QHP's Quality Management System which is certified by LRQA in accordance with ISO 9001:2008.

QHP use portable coordinate measuring machines (CMM) to validate dimensions with a possible accuracy of  0.005mm, this is highly effective in confirming the dimensional quality of precision machined components used in pressure vessels.


Material and test documentation is available for accumulator, compensators and related products.

Material certification to EN10204.3.1 is standard for pressurised components within our accumulator range.

All PED certified vessels are issued with a declaration of conformity as standard.

All ASME VIII Div 1 U coded vessels are issued a U1A form as standard.

Many customers now prefer substantial and complex documentation packages to be issued electronically; this can be done in various formats or hard copies supplied as required.