BS ISO 7005-1:2011 pdf free.Pipe flanges – Part 1: Steel flanges for industrial and general service piping systems.
This part of ISO 7005 establishes a base specification for pipe flanges suitable for general purpose and industrial applications including, but not limited to, chemical process industries, electric power generating industries, petroleum and natural gas industries. It places responsibility for the selection of a flange series with the purchaser.
It is applicable to flanges within facilities engaged in the processing or handling of a wide variety of fluids, including steam, pressurized water and chemical, petroleum, natural gas or related products.
EXAMPLE Steam power plant, petroleum refinery, loading terminal, natural gas processing plant (including liquefied natural gas facilities), offshore oil and gas production platforms, chemical plant, bulk plant, compounding plant, tank farm.
This part of ISO 7005 is also applicable to packaged equipment piping, which interconnects individual pieces or stages of equipment within a packaged equipment assembly for use within facilities engaged in the processing or handling of a variety of fluids, including steam and chemical, petroleum, natural gas or related products.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1092.1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories — PN designated — Part 1: Steel flanges
ANSI/ASME B16.5, Pipe Flanges and Flanged Fittings — NPS 1/2 through NPS 24 Metric/Inch Standard ANSI/ASME B16.47. Large Diameter Steel Flanges — NPS 26 Through NPS 60 Metric/Inch Standard
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 ambient temperature
temperature of the surrounding atmosphere in the immediate vicinity of the flange used in a piping system
3.2 design pressure
most severe pressure, taking into account its corresponding temperature selected for the design of the piping to which the flange is attached
NOTE The piping design pressure, taking into account the flange material and its application temperature, is not permitted to exceed the maximum allowable pressure listed in the tables of pressure)temperature ratings of the reference flange standard.
3.3 design temperature
maximum temperature, at design pressure, likely to be reached in operation as either the temperature of the flowing fluid or the temperature at the mid-thickness of the piping wall to which the flange is attached, as specified by the purchaser
NOTE The piping design temperature, taking into account the flange material and its application pressure, is not permitted to exceed the maximum allowable temperature listed in the tables of pressure/temperature ratings of the reference flange standard
3.4 fabricator erector
individual or organization that takes responsibility for fabrication or installation of piping in accordance with the owners piping engineering design specification and in accordance with the requirements of the governing piping code or standard
NOTE When so designated by the owner, he may be recognized as the purchaser: not to be confused with a flange manufacturer.
3.5 flanged joint joint that is composed of interrelated components (flanges, gasket and bolting), which are assembled with good practice to provide both mechanical strength and leaktightness
3.6 flange nominal size PN series) alphanumeric designation of size, used for reference purposes, which is common for components used in a piping system, comprising the letters ON followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection, as appropriate
4 Purchaser specification data
4.1 Specification details
4.1.1 General
The purchaser shall provide the flange manufacturer with the following information.
4.1.2 Flange series
Flange series shall be specified as PN or class.
If PN series is specified, flanges shall be in accordance with EN 1092-1.
— If class series is specified, flanges shall be in accordance with ANSI/ASME B 16.5 or ANSI/ASME B 16.47
series A or B, as applicable.
4.1.3 Flange rating designation
Flange rating designation shall be specified as PN or class with the associated identifying dimensionless number that, along with the flange material, identifies the pressure/temperature rating that applies for a specific flange.
4.1.4 Flange size
Flange size designation shall be specified as DN or NPS with the associated identifying dimensionless number that relates to the piping size in which the flange is used.
— If PN series is specified, flange size shall be DN in accordance with EN 1092-1.
— If class series is specified, flange size shall be NPS in accordance with ANSI/ASME B16.5 or ANSI/ASME B 16.47, as applicable.BS ISO 7005-1 pdf download.