API RP 15S:2006 pdf download
API RP 15S:2006 pdf download.Qualification of Spoolable Reinforced Plastic Line Pipe.
The degree of bonding within and between the various layers of different RTP or SCP products can vary, and can influence several aspects of performance, including flexibility, response to permeated gas and load transfer in end fittings and couplers. No specific test of bond strength or efficiency is required by this RP. Rather pipe design and performance will be validated by the product successfully completing the suite of qualification tests in this document.
End fittings or couplers are used to terminate pipe ends or connect adjacent pipe sections. Termination is typically achieved through compression of the pipe structure between metallic components, with a load path going though various layers of the pipe structure depending on design. Some products employ electrofusion couplers. Standard connectors, e.g. flanges, are used to connect the pipe to adjacent sections of pipe in the process system.
4.2 MATERIALS SELECTION
The manufacturer shall be responsible for the selection and supply of all materials so that they meet the specified service and installation requirements.
4.2.1 Polymeric Liner
The liner shall maintain its integrity throughout the lifetime of the pipe for the specified fluids under the given service conditions. The manufacturer shall document materials properties, and the effects of service conditions on those properties, including:
absorption of species from the carried fluid; leaching of low molecular weight material or plasticiser from the polymer; chemical changes to the molecular structure of the polymer; and environmental stress cracking. This RP qualifies the performance of the liner by a series of qualification tests based on current industry best practice.
Material qualification data shall be documented as agreed between the manufacturer and the purchaser. Guidance within Table I I of API Specification I 7J is useful in this respect, and the manufacturer should provide a summary of this test data for each liner material. For applications where gas or volatile components may be present under pressure, the liner polymer itself shall have adequate resistance to blistering.
The most common liner material is PE. Only established ‘pipeline’ grades shall be employed, namely PE 80 or PE 100 materials as defined by EN 12202 and EN 1555, or equivalents as defined by ASTM D3350.
Other liner materials, such as crosslinked polyethylene (PEX), polyamide (PA), and polyvinylidene fluoride (PVDF), may be used provided that they conform to the material requirements of a relevant pipe standard, e.g. ISO 1453 1-1 for PEX and ISO 1093 1-2 for PVDF, and that fitness for purpose has been established. The manufacturer shall provide data, where applicable, relating to mechanical behavior, thermal behavior, permeability and fluid compatibility, following relevant national and international standards.
Fusion joints in a PE liner shall be acceptable so long as they are made according to the manufacturer’s written procedure, which shall be consistent with ISO 11414 or ASTM D2657. The manufacturer shall demonstrate that the properties of the joint are equal to those of the parent pipe. Suitable QA checks shall be included in manufacture to control the fusion process. The position of all fusion joints shall be recorded by the manufacturer.
4.2.2 Structural Layer
The structural layer, including any bonding agents, shall sustain its integrity throughout the lifetime of the pipe under the given service conditions. The manufacturer shall provide the test data that demonstrate the short term and long-term load-bearing capabilities of the layer, and the temperature capabilities, required fluid compatibility and aging characteristics of all materials employed. This RP qualifies the performance of the structural layer by a series of qualification tests based on current industry best practice. Where “dry” glass fibers are employed as the structural layer, the additional requirements of Appendix A shall apply.
4.2.3 Cover Materials
The cover shall sustain its function throughout the lifetime of the pipe for the specified service conditions. The resistance to installation loads and environmental conditions (UV, wear etc.) shall he documented if required by the application or by the purchaser.
