ISO 15607。 ISO 15609-1, ISO J5614- 1, ISO 15614•2 and ISO 15dt 0。

use‹l as a welding aid shall be completely removed following settling,

eithor intcgrs›l or loose, liken that the minimum

wall thickness is mainlai‹›ed。 Hcst treatment, following welding, to ensure that the valve  body  and  flange materials are suitable for the full range of Srrvl£e conditions, shall be performed as required by the material specification。石油、石油化工及相关金属球阀行业

    1、范围

本国际标准规定了一系列适用于石油、石化、天然气产业及相关工业应用的金属球阀的要求。

它涵盖了阀门的公称尺寸DN：

——8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600；

与公称管道尺寸相对应：

——¼, ⅜, ½, ¾, 1, 1 ¼, 1 ½, 2, 2 ½, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24

适用的压力等级：

——Class 150; 300; 600; 800 (Class 800 只适用于有螺纹端或承插焊端的阀门)

——PN 16, 25, 40, 63, 100

它包含了如下检验和检查阀门特性的规定：

——法兰和对焊端，大小在 15 ≤ DN ≤ 600 (½ ≤ NPS ≤ 24);

——承插焊和螺纹端，大小在 8 ≤ DN ≤ 50 (¼ ≤ NPS ≤ 2);

——被指定为全径、缩径和双缩径的阀体座孔；

——材料。

2、参考规范

下列下列参考规范是使用本标准所不可缺少的。标有日期的，只有该引用版本适用。未标注日期的是指采用其最新版本（包括任何修订版本）。

ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and designation 

ISO 7-2, Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means of limit gauges

ISO 261, ISO general purpose metric screw threads — General plan

ISO 965-2, ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality

ISO 4032, Hexagon regular nuts (style 1) — Product grades A and B

ISO 4033, Hexagon high nuts (style 2) — Product grades A and B

ISO 4034, Hexagon regular nuts (style 1) — Product grade C

ISO 5208, Industrial valves — Pressure testing of metallic valves

ISO 5209, General purpose industrial valves — Marking

ISO 5752, Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions

ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels

ISO 15156-1, Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production — Part 1: General principles for selection of cracking-resistant materials

ISO 15156-2, Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production — Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons

ISO 15156-3, Petroleum and natural gas industries — Materials for use in H2S-containing environments in oil and gas production — Part 3: Cracking-resistant CRAs (corrosion resistant alloys) and other alloys

ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules

ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding procedure specification — Part 1: Arc welding

ISO 15610, Specification and qualification of welding procedures for metallic materials — Qualification based on tested welding consumables