Piping Material Take Off (MTO) Procedure

Clause	Details
MTO-INST-001	MTO for instrument air supply lines to manifold or individual lines to end user is considered as per project standard.
MTO-INST-002	If sizes for control valves and PSV not given in PID, one size smaller is considered for the same. Also mark hold if not given in PID.
MTO-INST-003	Minimum pipe size is required for thermowells. Required MTO Taken for the same.
MTO-INST-004	MTO for Instrumentation on Standpipe which includes LG, LT instruments, vent and drain, stand pipe taken as per PID/Standard Assembly.
MTO-INST-005	MTO for inline instruments is properly considered as per piping-instrument interface diagram.
MTO-INST-006	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.
MTO-INST-007	MTO for pressure connections taken as per Instrument Hookup Drawing.
MTO-INST-008	FE and Orifice flanges should not be considered in MTO. They are in instrumenatation department scope.
MTO-INST-009	Ensure MTO for flanges of RO-Restriction Orifice.
MTO-INST-010	Ensure Upstream & Downstream straight run requirement for flow instruments.
MTO-INST-011	Ensure MTO is not taken for Tagged Instrument Valves.

Clause	Details
MTO-FLG-001	For spec break at flanges, flange in lower rating line should be of same rating as that of connected higher rating flange.
MTO-FLG-002	Breakup flanges for removable spools are required for equipments like Heat exchangers, Pumps, Compressors. If not shown in PID, mark them and send comments to Process Department.
MTO-FLG-003	Consider breakup flanges for temporary/conical strainers.
MTO-FLG-004	Consider breakup flanges for material handling requirements.
MTO-FLG-005	Insulating gaskets kit considered if required in specification for flanges joint of dissimilar metals.
MTO-FLG-006	Jackscrew flanges are needed for larg bore spacers, blinds or spectacle blinds as per Specification.
MTO-FLG-007	Breakup-flanges for prefabricated flanged spools of galvanised lines are considered based on max length of spool that can be galvanised or transported. (Normally 4″ and above).
MTO-FLG-008	Breakup flanges for internally lined pipes (PTFE/FBE etc.) considered based on vendor recommendations on max spool length.
MTO-FLG-009	Weldolet / reducing tee with a flange considered for large size branch from a galvanised header. (As per spec.)
MTO-FLG-010	Extra bolt lengths for flange connections with wafer type valves, PSVs, insulating gaskets, spectacle blind, restriction orifice, conical strainer etc.

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