Common use of Hydrostatic strength test Clause in Contracts

Hydrostatic strength test. The outlet opening in components is plugged and valve seats or internal blocks are made to assume the open position. One unit is tested without being subjected to other design qualification tests in order to establish a baseline burst pressure, other units are tested as specified in subsequent tests of Annex 4, paragraph 2. (a) A hydrostatic pressure of 250 per cent NWP (+2/-0 MPa) is applied to the inlet of the component for three minutes. The component is examined to ensure that rupture has not occurred; (b) The hydrostatic pressure is then increased at a rate of less than or equal to 1.4 MPa/sec until component failure. The hydrostatic pressure at failure is recorded. The failure pressure of previously tested units shall be no less than 80 per cent of the failure pressure of the baseline, unless the hydrostatic pressure exceeds 400 per cent NWP.

Hydrostatic strength test. The outlet opening in components is plugged and valve seats or internal blocks are made to assume the open position. One unit is tested without being subjected to other design qualification tests in order to establish a baseline burst pressure, other . Other units are tested as specified in subsequent tests of Annex 4, paragraph 2. (a) A hydrostatic pressure of ≥ 250 per cent NWP (+2/-0 MPa) is applied to the inlet of the component for at least three minutes. The component is examined to ensure that rupture has not occurred; (b) The hydrostatic pressure is then increased at a rate of less than or equal to ≤ 1.4 MPa/sec s until component failure. The hydrostatic pressure at failure is recorded. The failure pressure of previously tested units shall be no less than ≥ 80 per cent of the failure pressure of the baseline, unless the hydrostatic pressure exceeds 400 per cent NWP.