... be made, according and conforming to the following internationalstandards:1) American standard (ASTM Sch 40 & Sch 80, SDR 21, SDR 26, SDR41 ... 141, SS 272, SS 213)4) Australian standard (AS 1477, AS 1415)5) Japanese standard (JIS K 6742, JIS K 6741, JIS ... K 6743, JIS K 6739)6) National standard (GB 10002, GB 5836, GB 14823, GB 13664)7) International ...