API St 20D-2019 pdf download.Qualifcation of Nondestructive Examination Services for Equipment Used in the Petroleum and Natural Gas Industry.
3 Terms, Defnitions, Acronyms, Abbreviations, Symbols, and Units 3.1 Terms and Defnitions For purposes of this standard, the following terms, defnitions, and acronyms apply. Defnitions relating to NDE, which appear in ASTM E1316, apply to the terms used in this standard. 3.1.1 acceptance criteria Defned limits placed on characteristics of materials, processes, products, or services. 3.1.2 calibration Comparison and adjustments to a standard of known accuracy. 3.1.3 check A process performed to maintain confdence in the calibration status of reference, primary, transfer, or working standards and reference materials, performed according to defned procedures and schedules. 3.1.4 complex geometry Castings, forgings, or machined parts with varying thicknesses (i.e. counter-bores, compound angles, cavities) that provide challenges to identify surface or volumetric indications. 3.1.5 liquid penetrant examination An NDE method for detecting surface-breaking faws by bleedout of a colored or fuorescent dye from the faw. 3.1.6 magnetic particle examination An NDE method for detecting discontinuities on or near the surface in suitably magnetized materials, which employs fnely divided magnetic particles that tend to congregate in regions of the magnetic nonuniformity (i.e. along cracks, over inclusions, voids, etc.). 3.1.7 nondestructive examination NDE A method used to check the soundness of a material or a part without impairing or destroying the serviceability of the part. NOTE The term NDE may be known as NDT or NDI in other standards.
3.1.8 procedure qualifcation The process whereby a written NDE procedure is qualifed in accordance with the requirements of this standard. 3.1.9 qualitative quality indicator QQI A fawed shim used to establish proper feld direction and feld strength during technique development in magnetic particle examination. 3.1.10 radiographic quality level An expression of the quality of a radiograph in terms of an image quality indicator (penetrameter). 3.1.11 radiography An NDE method wherein a source of X-rays or gamma rays is used to indicate the subsurface condition of opaque materials. 3.1.12 TAM Panel Penetrant system testing and monitoring panel used as a quick and effcient means for determining the continued serviceability of liquid penetrant inspection systems. Fluorescent, water wash, nonwater wash, hydrophilic, lipophilic, and visible penetrants. 3.1.13 traceability The ability to verify the history, location, or application of an item by means of documented recorded identifcation. 3.1.14 ultrasonic examination An NDE method of testing materials by transmitting high frequency sound waves through them. 3.1.15 verifcation The adjustment of an NDE instrument using an appropriate reference standard to obtain or establish a known and reproducible response. This is usually done prior to an examination but can be performed any time there is concern about the examination or instrument response.
4 Quality Management System (QMS) The NDE service provider shall establish, document, implement, and maintain at all times a QMS conforming to API Specifcation Q1, API Specifcation Q2, or ISO 9001. In addition, the NDE service provider shall be responsible for conforming to all the applicable requirements of this standard. 5 Facility Requirements To conform to this standard, the NDE service provider shall be in conformance with ISO 17025 or international equivalent and have the following on-site capabilities, at a minimum: — a facility to store and maintain equipment and associated consumables; — appropriate handling and lifting equipment; — inspection and test equipment applicable to each method and location (i.e. feld work). — safety program to address staff, public, and environmental concerns with NDE methods. 6 Responsibilities and Duties The NDE service supplier shall ensure that it: — performs all examinations in accordance with specifed standards or quality control criteria, or both; — performs only examinations for which it is equipped and staffed; — performs only examinations for which its employees are qualifed; — ensures that equipment is calibrated and personnel are certifed in accordance with service supplier’s written procedure; — ensures that all equipment is maintained in accordance with service supplier’s written procedure; — informs the purchaser of any discrepancy or limitation imposed on the testing accuracy by such factors as surface fnish, form, shape, or procedure; — calls to the attention of the purchaser any irregularity or defciency noted in the documents; — submits promptly to the purchaser formal reports of all examinations that indicate compliance or noncompliance of the material. — develops and qualifes procedures.