ASTM A815 Spection inovhara makirasi maviri, WP uye yakagadzirwa-serritic, fanticic, /Austenitic, uye martensitiki simbi masimbi ekuvaka asina kusungwa uye akasungwa. Kirasi WP Fittings yakakundwa mune mana subclasses: Makirasi WP-S, WP-W, WP-WX, uye WP-WU. Izvo zvinyorwa zvezvakakodzera zvinofanirwa kukanganwira, mabara, mahwendefa, kana asina maseya kana akabatikana tubular zvigadzirwa.