VALVE STANDARD

VALVE STANDARD

JIS B2220 STEEL PIPE FLANGES :

SCOPE :

This Standard specifies steel pipe flanges(hereafter eferred to as "flanges") of nominal size 10A to 1500A for nominal pressure 5K,10K,10K light type , 16K,20K and 30K which are sed to join parts for piping , such as steel pipes and valves, in ordinary,pressure ,high pressure,high temperature ,alloy steel pipes,strainless steel pipes piping for steam ,air ,gas,water,oil,etc.

 

 

ASTM A351/A351M-14 Standard Specification for Castings, Austenitic, for Pressure-Containing Parts:

1.1 This specification2 covers austenitic steel castings for valves, flanges, fittings, and other pressure-containing parts (Note 1).

Note 1Carbon steel castings for pressure-containing parts are covered by Specification A216/A216M, low-alloy steel castings by Specification A217/A217M, and duplex stainless steel castings by Specification A995/A995M.

1.2 A number of grades of austenitic steel castings are included in this specification. Since these grades possess varying degrees of suitability for service at high temperatures or in corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and high-temperature or corrosion-resistant characteristics, or both.

1.2.1 Because of thermal instability, Grades CE20N, CF3A, CF3MA, and CF8A are not recommended for service at temperatures above 800°F [425°C].

1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The Supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4.1 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. Within the text, the SI units are shown in brackets or parentheses.

 

 A216/A216M − 14 Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service1

1.1 This specification2 covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for
high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.
1.2 Three grades, WCA, WCB, and WCC, are covered in this specification. Selection will depend upon design and service
conditions, mechanical properties, and the high temperature characteristics.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.

 

 

ASTM A105/A105M-14 Standard Specification for Carbon Steel Forgings for Piping Applications

1.1 This specification2 covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the MSS, ASME, and API specifications referenced in Section 2. Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. Larger forgings may be ordered to Specification A266/A266M. Tubesheets and hollow cylindrical forgings for pressure vessel shells are not included within the scope of this specification. Although this specification covers some piping components machined from rolled bar and seamless tubular products (see 5.2), it does not cover raw material produced in these product forms.

1.2 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

1.3 Specification A266/A266M covers other steel forgings and Specifications A675/A675M and A696 cover other steel bars.

1.4 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units. The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

 

ASME B16.5 Pipe Flanges and Flanged Fittings NPS 1⁄2 Through NPS 24 Metric/Inch Standard

1.1 General
(a) This St andard covers pressure–t emperature ratings, materials, dimensions, tolerances, marking, testing,
and methods of designat ing openings for pipe flanges and flanged fittings. Included are
(1) flanges with rating class designations 150, 300,400, 600, 900, and 1500 in sizes NPS 1⁄2 through NPS 24
and flanges with rating class designation 2500 in sizes NPS 1⁄2 through NPS 12, with requirements given in both
metric and U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units
(2) flanged fittings with rating class designation
150 and 300 in sizes NPS 1⁄2 through NPS 24, with requirements given in both metric and U.S. Customary units
with diameter of bolts and flange bolt holes expressed in inch units
(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1⁄2 through NPS 24
and flanged fittings with rating class designation 2500 in sizes 1⁄2 through NPS 12 that are acknowledged in
Nonmandatory Appendix E in which only U.S. Customary units are provided
(b) This Standard is limited to
(1) flanges and flanged fittings made from cast or forged materials
(2) blind flanges and certain reducing flanges made from cast, forged, or plate materials Also included in this Standard are requirements and recommendations regarding flange bolting, gaskets, and joints.