ASME PCC-1–2019 pdf download

ASME PCC-1–2019 pdf download.Guidelines for Pressure Boundary Bolted Flange Joint Assembly.
TheQualifiedBoltingSpecialistshalldemonstratehisor her understanding in the assembly of bolted joints by taking part in at least one of the following range of bolted joint practical demonstrations and witnessing the other demonstrations. The demonstrations are designed to highlight significant aspects of the training curriculum and shall be performed in the presence, and to the satisfaction, of a Qualified Bolting Specialist Instructor. In addition, a practical examination of each candidate, requiring the assembly of at least two joints, shall be required. The criteria for pass/fail shall include measurementofthe obtained gasket deformation andbolt-loadvariationandshallbeassessedbyaQualified Bolting Specialist Instructor. The examination shall include all aspects of joint quality assurance that have been taught in the course. In addition, for heat exchanger or special joint supple- mental qualification, the practical examination shall include the assembly of a typical joint that falls within the supplemental qualification being sought. For powered-equipment supplemental qualification, a joint shall be assembled using both hydraulic tensioning and hydraulic torque equipment. The following demonstrations are suggested to high- light several critical points of joint assembly. Alternative demonstrations or modifications to the outlined details may be substituted for any of the demonstrations, provided the desired learning points are still achieved, as judged by the Qualified Bolting Specialist Instructor. A-2.4.1 ð19Þ Importance of Gasket Placement (a) Perform the following on a flange test rig having four or more bolts: (1) Assemble a four-bolt, small-diameter flange with aspiral-woundgasketwithoutinnerandouterrings,using a tightening pattern, and ensure that about half of the gasketwidth is noton the raised-face portion on one side.
Assemble a class 300, four-bolt, small-diameter flange with a class 150 spiral-wound gasket with outer ring, with the gasket in a vertical Perform the following on a flange test rig having four or more bolts: (1) Assemble a four-bolt, small-diameter flange with an expanded PTFE gasket without using a tightening pattern (i.e., using circular passes only). (2) Assemble a four-bolt, small-diameter flange with an expanded PTFE gasket using a tightening pattern per ASME PCC-1. (b) Observe gasket appearance, and measure the final thickness ofthe gasket after disassembly to demonstrate uneven loadingwhen cross-pattern tighteningis notused. A-2.4.4 Importance of Bolt Assembly Pattern and Correct Gasket Selection. Perform the following test on a flange test rig having eight or more bolts (≥NPS 6): (a) Assemble a joint with a spiral-wound gasket without inner and outer rings, without using a tightening pattern (i.e., using circular passes only). (b) Assemble a joint with a spiral-wound gasket with inner and outer rings, without using a tightening pattern (i.e., using circular passes only). (c) Assemble a joint with a spiral-wound gasket without inner and outer rings, using a tightening pattern. (d) Assemble a joint with a spiral-wound gasket with inner and outer rings, using a tightening pattern. (e) After each assembly, carefully remove each of the above gaskets from the rig and inspect for damage to gasketsealingintheformofunevencompressionorextru- sion of the gasket windings. A-2.4.5 Reaction of Different Types of Gaskets to Standard Tightening Procedure. Perform the following on a flange test rig having four or more bolts, with the capability to measure bolt load, stress, or elongation: (a) Assemble a four-bolt, small-diameter flange with a spiral-woundgasketwithoutinnerandouterrings,usinga tightening pattern, and ensure the gasket is centrally located on the raised face. Monitor the bolt load, stress, or elongation during the tightening to see when it stabilizes (number of passes). (b) Repeat with a spiral-wound gasket with inner and outer rings. spend a minimum of 20% of time working in the field with Qualified Bolting Specialists, Qualified Senior Bolting Specialists, trained bolting assemblers, trained senior bolting assemblers, bolting assemblers, or senior bolting assemblers. (c) assist with the amendment of existing work-site assembly procedures deemed inadequate or unsafe, or the development of revised work-site assembly proce- dures for unusual conditions or equipment. (d) attest to his or her compliance with (a) through (c) andprovideatleasttworeferencesfromco-workersorhis or her employer upon qualification and triennial renewal of qualification. At least one reference should be from a supervisor atthe individual’s currentor previous place of work.