CHEUNG HING FOUNDRY/Type Test for BS4622 :1970 Grey iron pipes



		HOKLAS accreditation is granted for specific tests or calibrations. An accredited laboratory is allowed to issue HOKLAS endorsed test reports/certificates only for tests and calibrations which it is accredited. The laboratory may carry out other activities for which it does not hold HOKLAS accreditation, but if it wishes to include the results of such activities on a HOKLAS endorsed test report/certificate, approval from the HKAS Executive must be obtained. Such activities will have to be clearly marked as non-accredited

Type tests for BS 4622 : 1970 Grey iron pipes

Items to be tested	Number of samples

Pipe	Range of DN (75, 100, 150, 200, 225, 250, 300, 350, 375, 400, 450, 500, 600, 700)
Dimension (External diameter of barrel of pipe, wall thickness of pipe, internal diameter of socket & depth of socket)	1 per DN
Hydrostatic test	1 per DN
Tensile test	1 per DN
Brinell hardness test	1 per DN

Coating	Bitumen test to BS 3416

Pipe