API RP 1110-2007 pdf download.Pressure Testing of Steel Pipelines for the Transportation of Gas, Petroleum Gas, Hazardous Liquids, Highly Volatile Liquids or Carbon Dioxide.
1 Introduction 1.1 GENERAL This Recommended Practice (RP) provides guidelines for pressure testing steel pipelines for the transportation of gas, petroleum gas, hazardous liquids, highly volatile liquids or carbon dioxide. The RP provides guidance so that: a. Pipeline operators can select a pressure test suitable for the conditions under which the test will be conducted. This includes, but is not limited to, pipeline material characteristics, pipeline operating conditions, and various types of anomalies or other risk factors that may be present. b. Pressure tests are planned in order to meet the overall objectives of the pressure test. c. Site-specific procedures are developed and followed during all phases of the pressure testing process. d. Pressure tests consider both personnel safety and environmental impacts. e. Pressure tests are implemented by qualified personnel. f. Pressure tests are conducted in order to meet stated acceptance criteria and pressure test objectives. g. Pressure test records are developed, completed and retained for the useful life of the facility. Users of this RP should be aware that further or differing requirements may be necessary for some applications. Nothing in this RP is intended to inhibit the use of engineering solutions that are not covered by the RP. This may be particularly applicable where there is innovative developing technology. Where an alternative is offered, the RP may be used, provided any and all vari- ations from the RP are identified and documented. 1.2 GUIDING PRINCIPLES The following RP provides a consistent means of preparing, assessing, using, and verifying pressure test results in order to help insure that the objectives of the pressure test are met. It also provides guidance for meeting the requirements of Integrity Manage- ment as stated in API Std 1160 and ASME B31.8S. This RP is not technology specific. It accommodates present and future technologies used for pressure testing steel pipelines.
This RP provides guidelines for documenting important information during each phase of the pressure testing process. Wherever possible, this RP utilizes existing terms and definitions from other applicable industry documents. Definitions of terms used in this RP are listed in Section 4. The use of a pressure testing process to manage the integrity of pipelines requires an appropriate amount of interaction between the provider of the inspection service (service provider), if one is used, and the beneficiary of the service (operator). This RP pro- vides guidelines that will enable service providers and operators to clearly define the areas of cooperation required and thus facil- itate the satisfactory outcome of the pressure testing process. Although many operators use service providers during various phases of the pressure testing process, it is important to note that the operator is ultimately responsible for: a. Identifying specific risks (threats) to be assessed as part of the pressure testing process. b. Choosing the proper pressure test in order to assess identified risks (threats). c. Confirming and verifying pressure test results.
4.16 gas: Natural gas, flammable gas or gas which is toxic or corrosive. 4.17 gouge: Elongated grooves or cavities caused by mechanical removal of metal. 4.18 hazardous liquid: Petroleum, petroleum products or anhydrous ammonia. 4.19 highly volatile liquid: A hazardous liquid which forms a vapor cloud when released to the atmosphere and has a vapor pressure exceeding 40 psia (276 kPa) at 100ºF (37.8ºC). 4.20 inspection: The use of a nondestructive testing technique. 4.21 leak test: A pipeline test designed to determine the presence or absence of leaks in a pipeline system. A leak test can be used alone or in addition to a spike pressure test and/or a strength pressure test as required by the pressure testing plan. 4.22 Nondestructive Testing (NDT): A process that involves the inspection, testing or evaluation of materials, components and assemblies for materials’ discontinuities, properties and machine problems without further impairing or destroying the part’s serviceability. 4.23 operating pressure: The actual steady-state pressure at a discrete point within a pipeline system at a specific time. 4.24 operating pressure limit: A generic term used to describe the upper end of the operating pressure range of a pipeline. In international codes and standards, it is often referred to as the Maximum Steady State Operating Pressure (see ASME B31.4—2002, Section 400.2) or Maximum Allowable Operating Pressure (see ASME B31.8—2003, Section 805.214). 4.25 operator: A person or organization that operates pipeline facilities. 4.26 petroleum: Crude oil, condensate, natural gasoline, natural gas liquids, and liquefied petroleum gas.