ASTM A815 Awọn iwe Iye-iwe ASTM Awọn kilasi Gbogbogbo Awọn kilasi Gbogbogbo, WP ati Kr, Ferritic \ / Ferritic \ / Agungun irin ti Seamless ati Ikole ikole. Awọn ohun elo WP kilasi ti wa ni ṣagbe sinu awọn isalẹ-isalẹ mẹrin: awọn kilasi WP-S, WP-W, WP-Wx, WP-WX, ati WP-WU. Ohun elo fun awọn ebute yoo ni awọn igbani laaye, awọn ifi, awọn farahan, tabi seamless tabi awọn ọja tubular tubu.