... following international standard: 1, ASTM, PN0.25-PN2.5 2, ISO, SCH5-SCH80 3, non-standards according to buyers’ requestPACKAGING DETAIL ... advance and the balance against the copyof the B/L)and L/C. MOQ AND CERTIFICATES: 5000 USD , ISO certificate, API certificate , Special Equipment certificate, Classification certificate.