Home>ASME standards>ASME B16.21-2005 pdf download

ASME B16.21-2005 pdf download

ASME B16.21-2005 pdf download.Nonmetallic Flat Gaskets for Pipe Flanges.
The following is a list of standards and specifications references in this Standard. ASME B16.1-1998, Cast Iron Pipe Flanges and Flanged Fittings ASME B16.5-2003, Pipe Flanges and Flanged Fittings ASME B16.24-2001, Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 400, 600, 900, 1500, and 2500 ASME B16.34-2002, Valves-Flanged, Threaded, and Welding End ASME B16.47-1996, Large Diameter Steel Flanges ASME B36.10M-2001, Welded and Seamless Wrought Steel Pipe Publisher: The American Society of Mechanical Engi- neers (ASME), Three Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300 MSS SP-51-1986, Class 150 LW Corrosion Resistant Cast Flanges and Flanged Fittings Publisher: Manufacturers’ Standardization Society of the Valve and Fittings Industry (MSS), 127 Park Street, NE, Vienna, VA 22180 ASME B16.21-2005 12 ISO 9000–1:1994, Quality management and quality as- surance standards — Part 1: Guidelines for selection and use ISO 9000–2:1997, Quality management and quality as- surance standard —Part 2: Generic guidelines for the application of ISO 9001, ISO 9002m and ISO 9003 ISO 9000–3:1997, Quality management and quality as- surance standards —Part 3: Guidelines for the appli- cation of ISO 9001 to the development, supply and maintenance of software ISO 9000–4:1993, Quality management and quality as- surance standards — Part 4: Guide to Dependability programme management ISO 9002:1994, Quality system —Model for quality as- surance in production and servicing ISO 9003:1994, Quality systems —Model for quality as- surance in final inspection and test Publisher: International Organization for Standardiza- tion (ISO), 1 rue de Varembé, Case Postale 56, CH- 1211 Genève 20, Switzerland/Suisse
2.3 Pressure Class Designation Class, followed by a dimensionless number, is the designation for common flange pressure-temperature ratings as given by the referenced flange standards. 3 MATERIALS 3.1 Composition Gaskets shall be made of resilient or pliable materi- als. Metal or nonmetal composites may be incorporated as reinforcement or filler material. 3.2 Service Requirements Selection of a material suitable for a given service ap- plication is the responsibility of the user subject to the requirements of any applicable code or government reg- ulation. The material selected shall be compatible with the fluid and suitable for the pressure-temperature con- ditions of the service. 4 DIMENSIONS AND TOLERANCES 4.1 Dimensions Gasket dimensions shall be in accordance with Tables 1 through 9 (Tables I-1 through I-9 of Appendix I) for the flanges standards, sizes, and classes indicated. Se- lection of gasket thickness is the responsibility of the user, considering the properties of the gasket material as well as the intended service application. 4.2 Tolerances (a) Outside Diameter (1) NPS 12 and smaller: ?0.0, ?1.5 mm (?0.0, ?0.06 in.) (2) NPS 14 and larger: ?0.0, ?3.0 mm (?0.0, ?0.12 in.) (b) Inside Diameter (1) NPS 12 and smaller: ?1.5 mm (?0.06 in.) (2) NPS 14 and larger: ?3.0 mm (?0.12 in.) (3) Bolt Circle Diameter: ?1.5 mm (?0.06 in.) (4) Center to center of adjacent bolt holes: ?1.0 mm (?0.03 in.) 5 MARKINGS 5.1 Material Marking Unless otherwise specified by the purchaser, gasket material shall be marked with the material manufac- turer’s name or trademark and material designation. 5.2 Gasket Marking Gaskets shall be packaged with NPS, Class, gasket manufacturer’s name, material designation, thickness, and ASME B16.21 marked or tagged on the package or gasket. At the option of the manufacturer, the DN des- ignation may be included.

Related PowerPoint Templates

Template Categories
Popular Tags