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API Spec 15PX-2018 pdf free download

API Spec 15PX-2018 pdf free download.Specification for Crosslinked Polyethylene (PEX) Line Pipe.
1 1.1 Introduction Purpose The purpose of this specification is to provide standards for crosslinked polyethylene (PEX) line pipe suitable for use in conveying oil, gas, and nonpotable water in underground, aboveground, and reliner applications for the oil and gas producing industries. This specification does not propose to address all of the safety concerns associated with the design, installation, or use of products suggested herein. It is the responsibility of the user of the standard to utilize appropriate health and safety considerations. All pipe produced under this standard utilizes pressure-rated materials used in pressurized, non-pressure, and negative pressure applications. The technical content of this document provides requirements and guidelines for performance, design, materials inspection, dimensions and tolerances, marking, handling, storing, and shipping. 1.2 Scope This specification covers PEX line pipe utilized for the production and transportation of oil, gas, and nonpotable water. The piping is intended for use in new construction, structural, pressure-rated liner, line extension, and repair of both aboveground and buried pipe applications. Specific equipment covered by this specification is listed as follows: a) b) 1.3 PEX line pipe; fittings. Service Conditions The standard service conditions for the API 1 5PX standard pressure rating are as follows: a) b) c) d) e) Standard pressure ratings in non-chemically-aggressive fluids; Service temperature range: -50 °C (-58 °F) to 95 °C (203 °F); NOTE Applications above 95 °C (203 °F) require special design consideration. The fluid environment is oil, gas, and nonpotable water and combinations thereof (see Table 1 ); Axial loads shall include end loads due to pressure only; Service conditions other than the standard API 1 5PX conditions are discussed in Section 5.
3.1.2 component Any pressure line pipe, pipe connection, fitting, flange, adapter, reducer, or end of outlet connection covered by this specification. 3.1.3 crosslinking The formation of a three-dimensional polymer by means of interchain reactions resulting in changes in physical properties. NOTE PEX materials used in the manufacturing of PEX line pipe may be crosslinked by a number of industry- proven means. These include: a) b) c) peroxide crosslinking (PEX-a); silane crosslinked (PEX-b); irradiation (PEX-c). 3.1.4 design service factor (DSF) A safety factor applied to the hydrostatic design basis (HDB) to calculate the standard pressure rating of the pipe. 3.1.5 design coefficient A coefficient with a value greater than 1 that takes into consideration service conditions as well as properties of the components of a piping system other than those represented in ó LPL . NOTE 1 When used with the DIN 1 6892/3 design method. NOTE 2 See ISO 1 21 62 for information regarding the minimum permissible service (design) coefficient for PEX pipes. 3.1.6 dimension ratio (DR) The ratio of a pipe’s outside diameter to its wall thickness. 3.1.7 fittings A piping component used to join or terminate sections of pipe or to provide changes of direction or branching in a pipe system. 3.1.8 flanges Appurtenances incorporating a PEX flange adapter and metallic backup ring with ANSI B1 6.5 bolt hole pattern.
3.1.9 fluid service factor (FSF) Factor applied in the determination of the maximum working pressure to account for the impact of the transported fluid on pipe performance. 3.1.10 hydrostatic design basis (HDB) The categorized long-term hydrostatic strength (LTHS) in the hoop direction as established by ASTM D2837. 3.1.11 material designation code A set of letters and numbers consisting of the abbreviation for the type of plastic (PEX) followed by four Arabic numerals—two to describe the short-term properties, in accordance with the ASTM standard being referenced, and two to designate the hydrostatic design stress when tested in water at 23 °C (73 °F) in units of 1 00 psi, with any decimal figures dropped. 3.1.12 maximum working pressure The maximum anticipated, sustained pressure applied to the pipe in actual service when the fluid service factor (FSF) and temperature service factor (TSF) are considered. 3.1.13 minimum required strength (MRS) The categorized lower prediction limit (LPL) of the long-term hydrostatic strength at 20 °C (68 °F) determined in accordance with ISO 9080 and ISO 1 21 62.

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