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Category Archives: Normas ASME

ASME B16.5 FLANGE DIMENSIONS AND RATINGS




ASME B16.5: Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/ Inch Standard
  • Threading of Pipe for American National Standard Threaded Flanges
  • Pressure-Temperature Ratings and Dimensional Data for Classes 150, 300, 400, 600, 900, 1500, and 2500 Flanges and Classes 150 and 300
  • Flanged Fittings in U.S. Customary
  • Method Used for Establishing Pressure-Temperature Ratings
  • Limiting Dimensions of Gaskets Other Than Ring Joint Gaskets
  • Method for Calculating Bolt Lengths
  • Quality System Program
  • Dimensions of Classes 400, 600, 900, 1500, and 2500 Flanged Fittings in U.S. Customary Units
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 /2 through NPS 12 that are acknowledged in Nonmandatory Appendix E in which only U.S. Customary units are provided.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.



ASME B16.5 ESPAÑOL




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

  • Method of Designating Location of Auxiliary Connections When Specified
  • Method of Designating Outlets of Reducing Fittings in Specifications
  • Thread Length for Connection Tapping
  • Socket Welding for Connections
  • Butt Welding for Connections
  • Bosses for Connections
  • End Flange Facings and Their Relationship to Flange Thickness and Center-to-End and End-to-End Dimensions
  • Bevel for Wall Thicknesses t From 5 mm to 22 mm Inclusive
  • Bevel for Wall Thicknesses t Greater Than 22 mm
  • Inside Contour for Use With Rectangular Backing Ring
  • Inside Contour for Use With Taper Backing Ring
  • Bevel for Outside Thickness
  • Bevel for Inside Thickness
  • Bevel for Combined Thickness
  • Straight Hub Welding Flanges

ASME B16.48 STANDARD




This Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for operating line blanks in sizes NPS ‘/2 through NPS 24 for installation between ASME B16.5 flanges in 2 the 150, 300, 600, 900, 1500, and 2500 pressure classes.

Blank Construction Materials

Dimensions of Class 150 Raised Face

Dimensions of Class 300 Raised Face

Dimensions of Class 600 Raised Face

Dimensions of Class 900 Raised Face

Dimensions of Class 1500 Raised Face

Dimensions of Class 2500 Raised Face

Dimensions of Class 150 Female Ring-Joint Facing

Dimensions of Class 300 Female Ring-Joint Facing

Dimensions of Class 600 Female Ring-Joint Facing

Dimensions of Class 900 Female Ring-Joint Facing

Dimensions of Class 1500 Female Ring-Joint Facing

Dimensions of Class 2500 Female Ring-Joint Facing

Dimensions of Class 150 Male Oval Ring-Joint Facing

Dimensions of Class 300 Male Oval Ring-Joint Facing

Dimensions of Class 600 Male Oval Ring-Joint Facing

Dimensions of Class 900 Male Oval Ring-Joint Facing

Dimensions of Class 1500 Male Oval Ring-Joint Facing

NORMA ASME B16.48 PDF

1.3.1 Referenced Standards to ASME B16.48.

Standards and specifications adopted by reference in this Standard are shown in Annex A, which is part of this Standard. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Annex A.Codes and Standards ASME B16.48.

Steel line blanks used under the jurisdiction of the ASME Boiler and Pressure Vessel Code, the ASME Code for Pressure Piping, or a governmental regulation are subject to the limitations of that code or regulation. This includes any maximum temperature limitation, or rule governing the use of a material at low temperature, or provisions for operation at a pressure exceeding the pressuretemperature ratings in this Standard.

6.1 General ASME B16.48

Line blanks conforming to this Standard shall be marked as follows:

(a) B16

(b) nominal size (NPS)

(c) nominal pressure class

(d) material, specification, and grade or class

(e) manufacturer’s name or trademark

f) ring number (if applicable)

ASME B31.1 STANDARD

ASME B 31.1: Power Piping
This code was written with power piping in mind included to cover fuel gas and oil systems in the plant, central and district heating system, in addition to water and steam systems in power plants.This code is for making new piping. It can be used as a guide for repair / replacement.

Boiler External and Non boiler External Piping :

The code has separate requirement for boiler external and non boiler external piping. Boiler external piping is actually within the scope of Secton I of B&PV code. Section I refers to B31.1 for technical requirement. Non boiler external piping falls entirely within the scope of B 31.1. thus boiler external piping is treated as part of boiler whereas nonboiler external piping is not.
Boiler external piping is considered to start at the first weld for welded pipe, flanged face for flanged piping, or threaded joint for threaded piping outside of the boiler. It extends to the valve or valves required by Section I. Both the joint with the boiler proper piping and the valves at the end of the piping fall within the scope of boiler external piping.

Systems Covered under B 31.1:

  1. Boiler external piping including steam, feedwater, blowoff, and drain piping;
  2. Instrument, control, and sampling piping;
  3. Spray-type desuperheater piping for use on steam generators and reheat piping;
  4. Piping downstream of pressure reducing valves;
  5. Pressure-relief piping;
  6. Piping for flammable and combustible liquids;
  7. Piping for flammable gased, toxic gases or liquids, or non flammable non toxic gases;
  8. Piping for corrosive liquids and gases;
  9. Temporary piping systems;
  10. Steam trap piping;
  11. Pump-discharge piping; and
  12. District heating and steam distribution systems.