API 20N 2019 pdf download.Heat Treatment Services—Continuous Line for Equipment Used in the Petroleum and Natural Gas Industry.
4? Heat? Treatment? Supplier? Qualifcation 4.1? Establishment? of? the? Process? Being? Qualifed The following continuous line heat treatment processes are covered in this document. The heat treatment supplier will qualify for one or more of the processes described in 4.1.1 through 4.1.4. 4.1.1 Continuous Process “Class A” This process involves no interruption in austenitize-quench-temper, or solution anneal and quench. a) Induction, gas fred, or electric heating in austenitizing and temper may be used. b) Quench by surface spray, bath immersion, surface spray/ID quench. 4.1.2 Semi-Continuous Hybrid “Class B” This process involves continuous austenitizing and quench followed by interrupted batch type temper. a) Induction, gas fred, or electric heating in austenitizing and tempering may be used. b) Quench by surface spray, bath immersion, surface spray/ID quench. c) Batch type temper (API 20H requirements shall apply for the batch type temper process). 4.1.3 Continuous Process “Class C” This process involves baskets or loose grouped components conveyed together through austenitizing–quenching- temper, or solution annealing-quench. a) Open or closed end thermal heating by gas, electric, or propane fred. b) Quench by surface spray, bath immersion, surface spray/ID quench. 4.1.4 Continuous Process “Class D” This process does not involve a quench. Normalizing, annealing or stress relieving, by induction, electric, or gas fred. 4.2 Quality Management System (QMS) The heat treatment supplier shall establish, document, implement, and maintain at all times a QMS conforming to API Specifcation Q1 or ISO 9001. In addition, the heat treatment supplier shall be responsible for conforming to all of the applicable requirements of this specifcation.
5 Responsibilities and Duties 5.1 General It is the responsibility of the heat treatment supplier to ensure that it: a) performs all heat treatment in accordance with specifed standards and applicable quality control criteria; b) performs only heat treatment of which it is adequately equipped and staffed; c) performs only heat treatment of which its employees are adequately qualifed; d) ensures equipment is calibrated and personnel performing calibration are qualifed in accordance with the requirements of the supplier’s written procedure; e) ensures facility and equipment is properly maintained; f) informs the purchaser of any discrepancy or limitation imposed on the requested heat treatment by such factors as size, traceability, form, shape, material or procedure; g) calls to the attention of the purchaser any irregularity or defciency noted in the procurement documents; h) promptly submits formal reports of all heat treatment to the purchaser; i) informs the purchaser of noncompliance of the specifed standards or procurement document requirements. 5.2 Personnel Training Requirements Personnel performing heat treatment (operators/supervisors) shall be trained and qualifed in accordance with requirements of the heat treatment supplier’s written procedure. Records of training and qualifcation shall be maintained. 6? Identifcation? and? Traceability The heat treatment supplier shall have a documented procedure for control of identifcation and traceability throughout the process. The procedure shall include, as a minimum: a) the method for verifying traceability upon receipt of material; b) the method for ensuring traceability of product after any processing where the original marking could be removed or burned off; c) requirements for maintenance or replacement of identifcation or traceability marks; d) the method used to maintain individual part level traceability if required by specifcation;
7.2 Temperature Uniformity Survey (TUS) 7.2.1 General The heat treatment supplier shall document a procedure that confrms TUS compliance to one or more methods listed below. There are fve acceptable TUS Methods for Continuous Furnaces, as listed below: 1) Volumetric method 2) Plane method 3) Probe method 4) Mechanical property evaluation 5) Non-contact optical pyrometer method (for induction only) 7.2.2 Volumetric Method—Raw Material Processing Continuous furnaces may be surveyed with TUS sensors that are arranged in a volumetric type fxture, which is conveyed through the furnace. The number and location of TUS sensors is determined by the furnace work zone volume to measure the entire work zone. The heat treatment supplier shall establish the boundaries of the work zone in their furnaces. This may exclude preheat zones or furnace entry/furnace exit areas that will not be applicable to the survey.