mto check list

Checklist forPiping MTO

PEC-EN-FRM-L-10755 Rev 0

PROJECT NAME : XXXXXXXXXXX XXXXXXXXXXXXX

PROJECT NO. :JI-XXXX CLIENT: XXXXXXXXXXXX XXXXXXXXXXX XXXX

MTO NO. : X DATE : DD/MM/YYYY

Sr. No Check Points

Check Box Remarks

APPLICABLE FOR ALL MTO’s

1 Break-up flanges are considered for big bore (4” and above or as specified in pipe class) galvanized lines with prefabricated flanged spools, based on the limitation of the pipe length that can be galvanized/transported.

2 Break-up flanges for the removable spools are considered for equipment like exchangers, air coolers top nozzles, pumps etc. If not shown on the P&IDs same shall be commented and sent to process for correction.

3 Break-up flanges are considered for internally lined (FBE/PTFE etc.) piping, based on the spool dimensions as per vendor recommendation that can be lined.

4 Break-up flanges for temporary/conical strainers are considered.

5 All reducer sizes are split as per ASME B16.9 wherever required. The same is indicated in P&IDs mark-up to process.

6 Dimensions of valves/fittings are deducted from pipe lengths for sizes 16” and above (applicable for manual MTO).

7 For pipe classes where SW/Threaded fittings are specified, sufficient quantity of full couplings/unions as applicable are considered.

8 MTO for air coolers is considered properly based on the details shown on the P&IDs, input from static group on nozzle arrangements and piping configuration.

9 MTO for hydro test vent and drain is considered.

10 MTO for utility stations is considered. Quantity of hoses is considered as per project specification.

11 MTO for sample point assemblies is considered.

12 MTO for vessel trim is considered.

13 MTO for instrument air supply lines to manifold or individual lines to end user is considered as per project philosophy.

14 MTO for wear pads, reinforcement pad, trunnions, jacketed lines steam pad etc. is considered.

15 MTO for steam tracers is considered.

16 Break-up flanges for jacketed lines are considered as per standard jacketed spool lengths.

17 MTO for jump over connections for jacketed lines considered.

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18 MTO for Steam and condensate manifolds along with supply and return lines along with steam trap assembly is considered.

19 MTO for drip leg on steam lines is considered.

20 MTO for steam trap assemblies for drip leg is considered.

21 Special requirement for valves (reduced bore, full bore, extended bonnet, extended stem, metal seated, soft seated, extended spindle, special trim, etc.) is ensured in MTO.

22 MTO for level instruments vent and drain and stand pipe is considered.

23 MTO for inline instruments is properly considered as per piping-instrument interface diagram. Minimum flange rating for control valve, ESD, MOV, PSV, etc. as well as offline instruments like TG/TT and equipment mounted instruments line LG/LT considered as per instrument requirements.

24 MTO for insulating gaskets is considered as shown on P & IDs.

25 Extra bolt lengths for wafer type valves, PSVs, insulating gaskets, restriction orifice, spectacle blind, conical strainer etc. are considered.

26 MTO for WPQ (welding procedure qualification) obtained from construction and is considered.

27 Jackscrew flanges are considered at large bore spacers/blinds or spectacle blinds based on project specification.

28 Material for special items which are fabricated from piping material is considered e.g. steam heating coils , air Sparger connections inside pits, condensate pots etc.

29 MTO for nozzles embedded in concrete pits and miscellaneous piping items required in the pit like stilling well is considered.

30 MTO for fire water rings, foam and deluge piping is considered.

31 MTO for expansion loops is considered as per input from stress group.

32 AIV analysis recommendation if any for higher thickness pipes or type of branch connection is considered. For flare headers, type of branch connection (90 deg/45 deg lateral) is considered as per PAM guidelines/project requirements.

33 For GRE lines extra wall thickness is considered wherever applicable as per stress recommendation.

34 MTO for items designed by civil e.g. U/G OWS system, encasement piping at road crossover is taken from civil and is considered.

35 MTO for OWS manhole vent piping and funnel drain to OWS manhole is considered if in piping scope.

36 Planometric for the utility distribution used for MTO is given to process for updating in P IDs.

37 For brown filed projects, re-usable items identified in P&IDs and

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are not considered in MTO.38 Special items (SP items) like different type of strainers, steam

traps, hose and hose couplings, injection quills, flame arrestor, corrosion coupons/monitor, valve interlocks, sight glass, bird screen, valve with specific Cv value, special check valve etc. is considered in SP item list and not duplicated in MTO.

39 For lines where MTO is taken from model, Data verification/Data consistency reports and RDB conflict reports generated and cleared.

40 For the lines where MTO is taken from model ‘MTO OFF’ report is generated from model and checked for the actual requirements.

41 P&ID’s are yellowed / highlighted for the lines where MTO is considered.

42 Special notes on P&IDs pertaining to MTO, if any are considered.

43 Insulation type (HC, CC, PP, ET, etc.) as per P&IDs. /line list is considered.

44 HOLD on the MTO items as shown on P & IDs is ensured.

45 MTO Basis is published as per BMS document ‘Piping material management, PEC-EN-GDE-L-10754’ clause 7.0 a.

APPLICABLE FOR MTO-1

46 Complete manual checking of the MTO extracted from IFR intelligent P & IDs is done for the correctness. Any discrepancy in P&IDs is informed to process for correction.


47 Complete manual checking of the MTO which is revised from IFR to IFA stage as extracted from intelligent P&IDs is done for the correctness. Any discrepancy in P&IDs is informed to process for correction.


48 Complete manual checking of the MTO which is revised from IFA to IFH stage as extracted from intelligent P&IDs is done for the correctness. Any discrepancy in P&IDs is informed to process for correction.

49 Spare quantity is considered as per BMS doc. no. PEC-EN-GDE-L-09295 in agreement with projects.

50 Piping items identified for substitution is verified and incorporated in the MTO where order cancellation of the surplus items is not possible as confirmed by procurement.


51 Complete manual checking of the MTO which is revised from IFH to IFD stage as extracted from intelligent P&IDs done, for

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the correctness. Any discrepancy in P&IDs is informed to process for correction.

52 MTO extracted from model for issued isometric lines is compared with intelligent P&IDs MTO for discrepancy. Based on observation either model is corrected or P&ID mark-up given to process for correction.



54 Complete manual checking of the MTO which is revised from IFD to IFC stage as extracted from intelligent P&IDs is done, for the correctness. Any discrepancy in P&IDs is informed to process for correction.

55 MTO extracted from model for issued isometric lines is compared with intelligent P&IDs MTO for discrepancy. Based on observation either model is corrected or P&ID mark-up given to process for correction.


Notes:1. This checklist shall be completed for each stage of the MTO by the Lead/Area

Designer.2. If any check box is not checked, then an explanation shall be indicated in the

Remarks column.3. Any other project specific points may be added to this checklist.

Check Record

Name Signature Date Remarks

This record shall be completed by the Discipline Checker and retained in the Project file along with the check print.

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mto check list

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