Volume-II of IV - GAIL

MECON LIMITED
REGD. OFF : RANCHI (BIHAR)
c:\fateh\standard\stad-eqp.wp
PROCESS & PIPING
DESIGN SECTION
NEW DELHI
STANDARD SPECIFICATION
TITLE Hydrostatic Testing of Onshore Cross- SPECIFICATION NO. PAGE 14 OF 17
country Pipelines
MEC/S/05/62/03 REVISION A
Further the temperature measurement shall be taken :
- during the filling operation
- during the thermal stabilization stage
- during the hydrostatic test
The thermocouple’s sensitivity shall enable temperature readings with an accuracy of
±0.2°C.
b) Water temperature shall also be measured on the pump delivery by means of a
recording thermometer (temperature recorder) throughout the filling stage.
The recording thermometer shall have the following features :
Accuracy ± 1% of the scale range
Scale - 10° to + 40° C
Recording: Continuous on tape or disk, diagram within 100mm
Feed : 20mm/h for tape diagrams, 7.5°/h for disk diagrams.
c) Ground temperature shall be taken by measuring pipe temperature at the
thermocouple prior to starting the filling operation.
d) Environmental temperature shall be recorded from the beginning of
pressurization to the end of the test by means of a recording thermometer
featuring the following characteristics:
Accuracy ± 1% of the scale range
Scale - 0° to + 60° C
Recording: Continuous on tape or disk, diagram width 100mm
Feed : 20mm/h for tape diagrams, 7.5°/h for disk diagrams.