(informative) Example Hot Tap Checklists This checklist is an example of a type of aid some facilities use as a reminder to accomplish the involved in hot tap operations in an orderly manner. Particular circumstances of jobs may dictate additional preparatory steps. A checklist like this may be retained as a record of the job. Location Date Job Prepared by 1—Before Starting the Hot Tap Each of the following considerations should be satisfied before starting the hot tap Date Time Initials Checked by 1 Review/follow hot tap machine manufacturer’s operating instructions. 2 Have the contents of the line or vessel to be hot tapped or welded been assessed, and MSDSs reviewed for health hazards, to assure procedure is appropriate? 3 Is the material in the line or vessel stable under heated conditions? 4 Has the connection been designed per Section 6 requirements? 5 Do the flanges, bolts, gaskets, pipe, and valve to be installed meet the code for the line or vessel to be hot tapped? 6 Has the welding procedure specification been developed as covered in this standard? 7 Have approved work permits (e.g., Hot Work, Hot Tap, Entry) been obtained? 8 Review manufacturer's instructions to ensure that the hot tapping machine has suitable pressure, temperature ratings, and adequate cutter travel for this job. 9 Has the valve been pressure tested and the cover fitted to assure that it will work and fit properly? 10 Has the exact location of the hot tap been identified and marked on the line or equipment? 11 Is the area to be hot tapped located on a line or below the liquid level of the tank or vessel? 12 Has the area to be welded been inspected for thickness and freedom from existing welds, laminations, hydro- gen attack, or other metallurgical imperfections? 13 Are tests and inspections current? 14 If laminations or defects have been found, has a thorough engineering evaluation been made by a qualified per- son to determine if and how to proceed with the work?
NOTE Facilities may choose to require subsequent follow-up observations to check for leaks. Table 3—Before Welding Each of the following considerations should be satisfied before welding: Date Time Initials Checked by 1 Are the welders qualified for the approved welding procedure (specification) to be used? 2 Is a preheat of the weld area required? 3 Is the fitting properly positioned to prevent misalignment of the hot tapping machine ? 4 Have the pressure and temperature of the contained materials been reduced as much as the process operation will 5 Have the flow, pressure, and level considerations of 6.3, 6.9, and 9.1 been considered? Table 4—Before Cutting Each of the following considerations should be satisfied before cutting: Date Time Initials Checked by 1 Has the weld been inspected and tested? 2 Has the hot tap fitting been pressure tested? 3 Have the hot tap valve, packing, gasket, and bolts been checked for leakage? 4 Have the packing or seals on the hot tapping machine been checked? 5 Has the bleed off valve been checked to assure it will hold, is operable, and is not obstructed? 6 Are all bolts on the pilot and cutter bit tight? (e.g. torqued to specification) 7 Is the coupon catcher on the bit? 8 Is the valve centered on the flange? 9 Has cutting depth been calculated to avoid cutting the opposite side of the pipe? 10 Has the boring bar been run through the to assure free passage? 11 Have the hot tapping machine and valve been purged, if recommended?