API TR 17TR1-2003 pdf download.Evaluation Standard for Internal Pressure Sheath Polymers for High Temperature Flexible Pipes.
1 SCOPE 1 . 1 GENERAL 1 .1 .1 This technical report defines the methodology and test procedures necessary for the evaluation of polymeric materials suitable for use as the internal pressure sheath of an unbonded flexible pipes in high temperature applications. It describes the processes by which the critical material properties, both static and dynamic, can be measured and evaluated against relevant performance criteria. 1 .1 .2 This document relates primarily to the properties necessary for an internal pressure sheath required for oil and gas production. These are most relevant to high temperature applications. Only thermoplastic materials are considered for the internal pressure sheath. Elastomeric materials, which are used in bonded flexible pipes, are not considered in this document. 1 .1 .3 This document has the following format: Section 1 Scope Section 2 Referenced Documents Section 3 Definitions and Acronyms Section 4 Service Application—Background to selection of material tests used in the evaluation programme Section 5 Evaluation Overview—The overall methodology employed in the evaluation of a candidate material Section 6 Evaluation Test Programme—Presents, in detail, each of the material tests which form the material evaluation test programme Section 7 Material Evaluation—Presents the criteria against which material test results should be compared and gives guidance on the interpretation of results. Section 8 Bibliography 1 .1 .4 The following two applications of the Evaluation Standard are considered: a. the evaluation of a candidate polymer for HT flexible pipe service, b. the evaluation of a candidate polymer to determine its generic performance envelope/limits. 1 . 2 SIGNIFICANCE 1 .2.1 This Evaluation Standard provides a procedure for determining whether candidate polymeric materials have the property levels necessary for successful use as the internal pressure sheath of an unbonded flexible pipe in high temperature high pressure applications.
1 .2.2 For the purposes of this document, high temperatures are defined as those between 130 and 200°C. High pressure is considered to be at least 34.5 MPa (5000 psi). 1 .2.3 This Evaluation Standard also provides a means for comparing the performance attributes of several potential pressure sheath materials for high temperature applications. 1 . 3 CURRENT STANDARDS 1 .3.1 The current standards which relate to the evaluation of polymers for internal pressure sheath applications are: i) API Specification 17J, “Specification for Unbonded Flexible Pipe,” First Edition , ii) API Recommended Practice 17B “Recommended Practice for Flexible Pipe,” Second Edition . 1 .3.2 These documents address all aspects of unbonded flexible pipe technology relevant to current levels of high temperature service; that is, to 130°C. 1 . 4 UNITS Système International (SI) units are used in this evaluation standard. Imperial units may be given in brackets after the SI units. 1 . 5 SAFETY The procedures described in this evaluation standard include materials tests requiring the use of high temperature and high pressure conditions, often with hostile chemicals. It is the responsibility of individuals or organisations using the standard to ensure that all appropriate safety procedures are implemented to prevent injuries to personnel and/or damage to equipment or facilities. 2. REFERENCED STANDARDS API Spec 17J Specification for Unbonded Flexible Pipe API RP 17B Recommended Practice for Flexible Pipe ASTM D256 Test Methods for Impact Resistance of Plastics and Electrical Insulating Materials
3 DEFINITIONS AND ABBREVIATIONS 3. 1 DEFINITIONS For the purposes of this standard, the following definitions apply: 3.1 .1 Flexible Pipe: An assembly of a pipe body and end fittings. The pipe body comprises a composite of layered materials (polymeric and metallic) that form a pressure containing conduit. The pipe structure allows large deflections without a significant increase in bending stresses. The term “pipe” is used in this document as a generic term for unbonded flexible pipe. 3.1 .2 Conventional Flexible Pipe: An unbonded flexible pipe which is suitable for internal fluid temperatures of up to 130°C. 3.1 .3 High Temperature Flexible Pipe: An unbonded flexible pipe which is suitable for internal fluid temperatures of between 130 and 200°C. 3.1 .4 Internal Pressure Sheath: The innermost contiguous polymeric layer of an unbonded flexible pipe, designed to contain transported fluids and ensure pipe integrity. 3.1 .5 Candidate Polymer: A polymeric material which is proposed for use as the internal pressure sheath of an unbonded flexible pipe and is being submitted for evaluation testing. 3.1 .6 End Fitting: A mechanical device which forms the transition between the flexible pipe body and the connector. The different pipe layers are terminated in the end fitting in such a way as to transfer the load between the flexible pipe and the connector. 3.1 .7 Test Temperature, Test Pressure: The temperature (T) and pressure (P) at which a test is to be run for the purposes of evaluating a candidate polymer. The choice of test temperature/pressure will depend only on the performance requirements for the proposed application. 3.1 .8 Test Result: The outcome of a materials test. This may be in the form of a physical quantity (e.g., Young’s modulus) or a subjective rating (e.g., blister damage). 3.1 .9 Maximum Property Temperature (MPT): The maximum temperature for which a specified property meets the performance criterion; for example, if a candidate polymer swells 50% in oil at 1