GoM Region Hot Bolting Safe Work Practice SWP

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GoM Region Hot Bolting Safe Work Practice SWP 1 Purpose Scope The purpose of this Safe Work Practice SWP is to outline the requirements for conducting safe Hot Bolting operations 2 Procedures 2 1 Hot Bolting Hot Bolting allows for corroding studs and nuts to be removed as part of preventative maintenance while the line is in service A risk assessment shall be performed prior to Hot

Transcription:

The position and type of flexible expansion joint affecting the flanged joint. Maintenance history of the joint, Personnel access and egress consideration should be given to the accessibility of the area and to. confirming that adequate escape routes are available should the pipe spring or should leakage occur. WARNING Hot Work cutting or burning on seized nuts studs shall not be allowed on flanges in. service Cold cutting is permissible and should be considered. Possible degradation of the nuts studs e g corrosion stress corrosion cracking fatigue. Possible degradation of the gasket,2 1 1 Potential Risk of Leakage. In Hot Bolting there is a potential risk of leakage caused by. Reduced gasket compression during bolt removal,Inadequate tightening on bolt replacement or. Gasket failure from over tightening of bolts on replacement. 2 1 2 Allowable Flanges, The practice of Hot Bolting shall only be allowed for those flanges indicated in Table 1 ANSI class. flanges and Table 2 API class flanges, 1 Some flanges require a decreased pressure rating during Hot Bolting from 9 percent to 72.
percent less than normal pressure rating or are not allowed at all ANSI 150 class flanges. Use Table 1 and Table 2 in conjunction with Hot Bolting safety practices to enhance. personnel safety and code compliance, 2 Flat face flanges are not addressed in this manual If Hot Bolting is necessary a. Management of Change and hazard assessment shall be performed. 3 For pressure class 150 4 bolt flanges in utility service only hot bolting maybe performed. by utilizing Hot Bolt clamps referenced specification 1400 20 IM PR 0001. All other pressure classes flange sizes or services 1400 20 IM PR 0001 is not applicable. Table 1 ANSI Class Flanges, Normal ANSI Flange Normal Normal Hot Hot Bolt Comments. Pipe Class Type Bolt PSI Bolt Allowed,Size Count Max PSI. 2 150 RF 4 285 No Insufficient gasket seat force,without use of hot bolt clamp. per 1400 20 IM PR 0001,2 300 RF 8 740 740 Yes,2 600 RF 8 1480 1480 Yes.
2 600 RJ 8 1480 1480 Yes Not available Use 2 ANSI 1500. 2 1500 RJ 8 3705 2850 Yes 23 pressure reduction,2 2500 RJ 8 6170 3700 Yes 40 pressure reduction. 3 150 RF 4 285 No Insufficient gasket seating force. without use of hot bolt clamp,per 1400 20 IM PR 0001. 3 300 RF 8 740 740 Yes,10 pressure reduction,3 600 RF 8 1480 1325 Yes. 10 pressure reduction,3 600 RJ 8 1480 1325 Yes,10 pressure reduction. 3 900 RJ 8 2220 1975 Yes,30 pressure reduction,3 1500 RJ 8 3705 2223 Yes.
40 pressure reduction,3 2500 RJ 8 6170 3680 Yes, 4 150 RF 8 285 No Insufficient gasket seating force. 4 300 RF 8 740 740 Yes,4 600 RF 8 1480 1350 Yes 9 pressure reduction. 4 600 RJ 8 1480 1350 Yes 9 pressure reduction,4 900 RJ 8 2220 2220 Yes. 4 1500 RJ 8 3705 3705 Yes, 6 150 RF 8 285 No Insufficient gasket seating force. 6 300 RF 12 740 740 Yes,6 600 RF 12 1480 1480 Yes,6 600 RJ 12 1480 1480 Yes.
6 900 RJ 12 2220 2220 Yes,6 1500 RJ 12 3705 3705 Yes. 8 150 RF 8 285 No Insufficient gasket seating force. 8 300 RF 12 740 740 Yes,8 600 RF 12 1480 1325 Yes 10 pressure reduction. 8 600 RJ 12 1480 1325 Yes 10 pressure reduction,8 900 RJ 12 2220 2220 Yes. 8 1500 RJ 12 3705 3705 Yes, 10 150 RF 12 285 No Insufficient gasket seating force. 10 300 RF 16 740 740 Yes,10 600 RF 16 1480 1480 Yes.
10 600 RJ 16 1480 1480 Yes, 12 150 RF 12 285 No Insufficient gasket seating force. 12 300 RF 16 740 740 Yes,12 600 RF 20 1480 1480 Yes. 12 600 RJ 20 1480 1480 Yes, 16 150 RF 16 285 No Insufficient gasket seating force. 16 300 RF 20 740 740 Yes,16 600 RF 20 1480 1350 Yes 9 pressure reduction. 16 600 RJ 20 1480 1480 Yes, Normal ANSI Flange Normal Normal Hot Hot Bolt Comments.
Pipe Class Type Bolt PSI Bolt Allowed,Size Count Max PSI. 18 150 RF 16 285 No Insufficient gasket seating force. 18 300 RF 24 740 740 Yes,18 600 RF 20 1480 1250 Yes 16 pressure reduction. 18 600 RJ 20 1480 1480 Yes, 20 150 RF 20 285 No Insufficient gasket seating force. 20 300 RF 24 740 740 Yes,20 600 RF 24 1480 1300 Yes 12 pressure reduction. 20 600 RJ 24 1480 1480 Yes, 24 150 RF 20 285 No Insufficient gasket seating force.
24 300 RF 24 740 740 Yes,24 600 RF 24 1480 1300 Yes 12 pressure reduction. 24 600 RJ 24 1480 1480 Yes,Table 2 API Class Flanges. Normal ANSI Flange Normal Normal Hot Hot Bolt Comments. Pipe Class Type Bolt PSI Bolt Allowed,Size Count Max PSI. 1 13 16 10K RJ 8 10000 4100 Yes 59 pressure reduction. 1 13 16 10K RJ 8 15000 5700 Yes 62 pressure reduction. 2 1 16 5K RJ 8 5000 2900 Yes 42 pressure reduction. 2 1 16 10K RJ 8 10000 3350 Yes 67 pressure reduction. 2 1 16 15K RJ 8 15000 4650 Yes 69 pressure reduction. 2 9 16 5K RJ 8 5000 3150 Yes 37 pressure reduction. 2 9 16 10K RJ 8 10000 3350 Yes 67 pressure reduction. 2 9 16 15K RJ 8 15000 4400 Yes 71 pressure reduction. 3 1 8 5K RJ 8 5000 2850 Yes 43 pressure reduction, 3 1 8 10K RJ 8 10000 3300 Yes 67 pressure reduction. 3 1 8 15K RJ 8 15000 4400 Yes 71 pressure reduction. 4 1 16 5K RJ 8 5000 2750 Yes 45 pressure reduction. 4 1 16 10K RJ 8 10000 2800 Yes 72 pressure reduction. 4 1 16 15K RJ 8 15000 4400 Yes 71 pressure reduction. 5 1 8 5K RJ 8 5000 3075 Yes 39 pressure reduction, 5 1 8 10K RJ 12 10000 3100 Yes 69 pressure reduction.
7 1 16 5K RJ 12 5000 3300 Yes 34 pressure reduction. 7 1 16 10K RJ 12 10000 3400 Yes 66 pressure reduction. 7 1 16 15K RJ 16 15000 4650 Yes 69 pressure reduction. NOTE Pressure ratings are for API 6B and 6BX flanges made of American Society for Testing. Materials ASTM A 105 material for API 6B flanges 5K rating or less or AIS 4130 for API. 6BX flanges 10K and 15K rating at 20 F to 200 F and with A193 Grade B7 bolts Calculations. are in accordance with ANSI B31 3,Above tables refer to weld neck flanges. 3 Key Documents,ANSI B31 3 Petroleum Refining Piping. API 6B Flanges,API 6BX Flanges,Revision Log, Revision Date Authority Custodian Revision Details. Ken DeJohn Ken 1 Note 3 under section 2 1 2,Sr Mechanical. 04 06 15 Gottselig Steve 2 Comment without use of hot bolt clamp. Laws per 1400 20 IM PR 0001 of table 1 ANSI,Class Flanges.
Discipline,Sr Mechanical Updated document with new Authority. 12 11 14 Engineering,Engineer Owner,Reformatted document to meet new GoM. GoM H S GoM Safety, 06 15 12 document control template standardization. Director Programs Lead,guidelines,Table 1 the Comment Not available use 2. GoM HSSE ANSI 1500 on Line with 2 Pipe Size 600,05 01 09 Programs.
Director ANSI Class RJ should be moved down one,line to correspond with 2 900 RJ line. 06 01 08 Programs Formatting and minor edits for clarification. Added guidance on risk assessment Added,more sizes and ratings based on engineered. S Garner S Tink calculations Changed CD from 10097 to. 02 28 06 R DeLeonardis C Kathy Kanocz UPS US SW GOM HSE DOC 00112 2 to. Jackson conform to new numbering nomenclature in,the new GoM HSSE doc base Changed 3. authorities and 1 custodian,S Garner B,Initial issue as controlled document Prior. 01 25 02 Herbert R White Ray Britt,revision history located in hard.

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