00738nam a22001935a 4500 EIQ.libpla002002 070322s1978####nyua##########000#0#eng#d 20070322191457.0 Nonmetallic flat gaskets for pipe flanges / América National Standard. New York : The América Society of Mechanical Engineers (ASME), 1978. vii, [28] h. : il., tablas ; 29 cm. "ANSI B16.21-1978 (revision of ASA B16.21-1962)". Tuberías Estándares. Procesos Tuberías. Processes Pipes. Pipes Standards. AR-BbSID spa AR-BbSID América National Standard. AR-BbSID BIB. PLAPIQUI 621.867 2 An 81 R 4987 B16.21