1、PFI Standard ES-45 |Denotes Revision (Revised December 2013) RECOMMENDED PRACTICE FOR LOCAL POST-WELD HEAT TREATMENT Prepared by Pipe Fabrication Institute Engineering Committee All PFI Standards are advisory only. There is no agreement to adhere to any PFI Standard and their use by anyone is entire
2、ly voluntary. Copyright by PIPE FABRICATION INSTITUTE Dedicated to Technical Advancements and Standardization in the Pipe Fabrication Industry Since 1913 USA 511 Avenue of Americas, # 601 New York, NY 10011 CANADA 655, 32ndAvenue, # 201 Lachine, QC H8T 3G6 WEB SITE www.pfi-institute.orgPFI Standard
3、ES-45 |Denotes Revision (Revised December 2013) ES-45 RECOMMENDED PRACTICE FOR LOCAL POST-WELD HEAT TREATMENT 1. Scope 1.1 This standard describes recommendations regarding procedures for local post weld heat treatment of welds on pipe fabrication. 1.2 The project contract and specification shall di
4、ctate when post weld heat treatment is required. 1.3 It is the intent of this standard to provide guidance in establishing the minimum requirements when performing local post weld heat treatment. 2. Methods 2.1 Local heat treatment shall be performed by electric resistance or induction method contro
5、lled with proper equipment and recording instruments. For more information regarding methods of heat treatment, consult AWS D10.10 “Recommended Practices for Local Heating of Pipe and Tubes”. 3. Personnel and Equipment 3.1 Personnel shall be trained in the operation of equipment, insulation material
6、s, proper application of thermocouples and have knowledge of heat treatment cycle for the particular codes and materials involved. 3.2 Measuring and recording equipment shall be in good working order and shall be calibrated in accordance with the applicable QA manual at a minimum of 1-year intervals
7、 3.3 Proper safeguards and redundancies shall be in place to ensure a proper heat cycle is monitored. Special attention shall be given to protect against accelerated heating or cooling rates and exceeding maximum temperature limits. It is strongly recommended that spare thermocouples be placed at l
8、ocations where the highest temperature will be anticipated as a precaution to thermocouple failure during the heating cycle. Thermocouples should use the capacitive discharge method of attachment. This method of attachment provides a more accurate measure of work piece temperature. 4. Fabricator Res
9、ponsibilities 4.1 Fabricator/erector shall be responsible for providing the following instructions in accordance with the applicable code and client specifications. 4.1.1 Job reference 4.1.2 Fabrication Code Paragraph 4.1.3 Material specification 4.1.4 Thickness upon which heat treatment will be bas
10、ed 4.1.5 Quantity A complete list of PFI members and available membership CHARTER MEMBERS CONTRACTOR MEMBERS ASSOCIATE MEMBERS AFFILIATE MEMBERS HONORARY MEMBERS Associate and Affiliate member contributors Walter Sperko Sperko Engineering Services, Inc. Greensboro, NC Thomas Warrelmann Victaulic Com
11、pany of America Easton, PA Sheryl Michalak Welding Outlets, Inc. Houston, TX PFI Standards and Technical Bulletins are published to serve proven needs of the pipe fabricating industry at the design level and in actual shop operations. Hence, such needs are continually considered and reviewed by the
12、Engineering Committee of the Pipe Fabrication Institute to provide recommended procedures, which have been demonstrated by collective experiences to fulfill requirements in a manner for Code compliance. However, as the PFI Standards are for minimum requirements the designer or fabricator always has the option of specifying supplementary conditions in the form of requirements beyond the scope of the PFI publications.
