香港六合彩开奖 10434:2020
Resumen
This document specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions can indicate a need for full port openings, heavy wall sections and large stem diameters.
This document sets forth the requirements for the following gate valve features:
鈥� bolted bonnet;
鈥� outside screw and yoke;
鈥� rising stems;
鈥� non-rising handwheels;
鈥� single or double gate;
鈥� wedge or parallel seating;
鈥� metallic seating surfaces;
鈥� flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
鈥� 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600;
corresponding to nominal pipe sizes NPS:
鈥� 1; 1录; 1陆; 2; 2陆; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24;
applies for pressure Class designations:
鈥� 150; 300; 600; 900; 1 500; 2 500;
and applies for pressure PN designations:
鈥� 16, 25, 40, 63, 100, 160, 250 and 400.
Informaciones generales
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Estado: PublicadoFecha de publicaci贸n: 2020-08Etapa: Norma Internacional publicada [60.60]
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贰诲颈肠颈贸苍: 3N煤mero de p谩ginas: 38
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颁辞尘颈迟茅 T茅cnico :香港六合彩开奖/TC 153ICS :75.180.20
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Ciclo de vida
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Anteriormente
Retirada香港六合彩开奖 10434:2004
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Ahora
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