Nine WJP class tankers numbered 571-579 were built for Shell in 1974. A further three (WJP 580-582) were added in 1976 followed by WJP 583 in 1978, WJP 584 in 1980 and WJP 606 and 607 in 1982. In 1985 WJP 579 and 580 were withdrawn from traffic and sent to South Australia. In 1986 WJP581-583 were converted to narrow gauge and reclassified JPC. Mobil owned WJP 585 and 586 were built in 1976. A third tanker 587 followed in 1978 and a final one 588 were built in 1979. They were all sold to BP in 1985. Ampol's WJP 591-594 were built in 1976. WJP 594 was withdrawn in 1981. WJP 601 and 602 were built for BP. By 2010 the 16 surviving wagons had been reclassified ATPF.

WAGR official photo of WJP class tanker (RHWA collection)