API St 20L-2018 pdf free download

API St 20L-2018 pdf free download.Qualification of Polymeric Seal Manufacturers for Use in the Petroleum and Natural Gas Industries.
5.5.13 The thermoplastic and thermoset seal manufacturer who perform welding applications shall have a welding procedure in place that is based on the recommendations of the resin manufacturers, as well as the result of internal process development. This procedure shall define the essential variables required to produce a conforming product. The thermoplastic and thermoset seal manufacturer shall perform verification of the welding output at predetermined intervals. This verification shall include destructive or nondestructive inspections, such as X-ray, dye penetrant, ultrasonic, calorimetry, and visual inspections. Annealing 5.5.14 The thermoplastic and thermoset seal manufacturer shall have an annealing procedure in place that is based on the recommendations of the resin manufacturers, as well as the result of internal process development. This procedure shall define the temperature, ramp rate, hold time, cool down and oven type. Gauges for measuring the above parameters shall be calibrated and the ovens shall be surveyed on a specified frequency. The thermoplastic and thermoset seal manufacturer shall perform verification of the annealed output at a specified frequency. This verification shall include destructive or nondestructive inspections, such as visual, rheological, calorimetric, or mechanical property measurements. Finished Part Processing 5.5.15 This processing step shall include any or all of the following operations: milling, turning, stamping, and thermoforming. The thermoplastic and thermoset seal manufacturer shall have procedures for such operations, with document control, that ensure conformance to customer requirements. Verification of the process output shall be performed and checked for conformance to requirements. The process output verification shall include dimensions, physical characteristics, packaging, labeling, and storage.
6.2.2 Records of the results of the supplier’s approval, including resulting actions, shall be maintained. 6.3 Control of Outsource Polymeric Seal Manufacturers and Service Suppliers Initial Approval of Outsource Polymeric Seal Manufacturers 6.3.1 Polymeric seal manufacturers may procure materials from other polymeric seal manufacturers. The polymeric seal manufacturer shall ensure that the outsource polymeric seal manufacturer is qualified through one of the below methods: a) maintaining an API Standard 20L license; b) an accredited QMS; c) verification that the supplier’s QMS conforms to the quality system requirements specified for suppliers by the polymeric seal manufacturer; and d) testing and qualifying the order against the requirements of Section 7.2. Records 6.3.2 Records of the results of the sub-polymeric seal manufacturer’s approval, including resulting actions, shall be maintained. 6.4 Control of Service Suppliers Initial Approval 6.4.1 A polymeric seal manufacturer shall approve service suppliers as specified in Table 2. If the processes listed in Table 2 are performed, the polymeric seal manufacturer shall be in conformance with the listed standards or equivalents. Records 6.4.2 Records of the results of the service supplier approval, including resulting actions, shall be maintained.
6.5 Control of Outsourced Custom Mixer General 6.5.1 A supplier for mixed compound shall have the capability to mix the compound and meet the requirements of this standard and the polymeric seal manufacturer’s specification. The supplier shall follow a documented quality control program for the mixing operation that addresses the following: — Raw material certificates shall be verified to be compliant with the raw material manufacturer’s specification. — At a minimum, a rheometer test shall be required as part of the mixer’s quality program. — For mixed production compound, all lots or batches of compound shall be tested by the custom mixer and meet the specified physical properties before being shipped. The physical property testing frequency shall be at least one sample from every 1 0 batches mixed throughout the run.