PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

Page: 125 / 404

125
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
9.3.2 - REPLACEMENT FREQUENCY FOR COMPONENTS SUBJECT TO WEAR
NOTICE!
The following provisions shall apply to equipment components only.
The non-metallic parts of the equipment concerned are divided into the following two categories:
Preventive maintenance work
Category 1
Parts subject to wear and/or abrasion, where:
• wear and tear means the normal degradation of a part after prolonged use under normal oper-
ating conditions;
• abrasion is the mechanical action on the surface of the affected part resulting from the passage
of gas under normal operating conditions.
Category 2 Parts subject to aging only, including parts that also require lubrication and/or cleaning.
Tab. 9.87.
NOTICE!
Check, within the minimum frequency specified in Tab. 9.89, the available components for wear/abrasion/
aging.
Category Part description Evaluation criterion
Minimum
replacement
frequency
1
Sealing rings for non-metallic valve seats
and plugs
Pressure regulators
6 years Safety devices
Pressure safety system equipment
1
Non-metallic parts with internal sealing
function of valve seats and accessories of
individual equipment
Pilots
6 years
Pre-regulators
Accelerators
Others possible
1
Non-metallic parts with a sealing function
between parts, at least one of which is in
motion under normal working/operating
conditions
Pressure regulators
6 years
Gas flow slam-shut type safety devices
Relief devices with discharge to atmos-
phere
1
Non-metallic parts with sealing function
involved in disassembly operations during
maintenance
Equipment subject to maintenance 6 years
2
Non-metallic parts providing feedback
(sensing elements) of the controlled pres-
sure of safety equipment
Safety equipment and/or accessories 6 years
2
Non-metallic parts with sealing and per-
formance functions (diaphragms) of equip-
ment
Pressure regulators and accessories 6 years
Gas flow slam-shut type safety devices 6 years
Relief device with discharge to atmosphere 6 years