ISO 7005-1:2011 pdf free download – Pipe flanges一 Part 1: Steel flanges for industrial and general service piping systems.
3.21
piping system
interconnected piping components, including flanges, subject to the same set or sets of design conditions
3.22
plant
industrial plant used for the purposes of generating electric power, manufacturing or processing of chemicals, or raw materials or intermediates for such chemicals, where such chemicals may also be petroleum products
EXAMPLE Power station, chemical plant or refinery.
NOTE A plant may include supporting and service facilities, such as storage, utility and waste treatment units.
3.23
purchaser
individual or organization that takes responsibility for specifying requirements for flanges or flanged components, including the designating of the flange series, used in piping system applications in accordance with any requirements established using this part of ISO 7005
NOTE The purchaser can be the owner of the plant or his designated agent.
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 B16.47, as applicable.
4.2 Responsibilities
4.2.1 Owner
The owner is normally responsible for the operation of a fluid handling or process facility, such as a power plant, petroleum refinery, chemical plant or other facility where the piping is installed and operated. The owner or his designated agent has the responsibility for specifying flange material and the flange series, e.g. class or PN. The owner establishes requirements for design, construction, examination, inspection and testing which govern the entire facility of which the flanges are only a small part. It is the responsibility of the owner to ensure that any service requirements and limits are designated for the piping in which flanges are installed.
4.2.2 Manufacturer
The manufacturer of flanges shall manufacture these piping components in accordance with the requirements of this part of ISO 7005 and the purchaser specifications. The manufacturer of flanges is not responsible for the specification of flange material or of gaskets or bolting materials.
4.2.3 Fabricator and/or erector
The fabricator and/or erector of flanged joints should install pipes, piping, piping components and piping systems having flanged joints in accordance with the instructions specified by the owner.