Page 185 - Machinery Component Maintenance

Process Machinery Piping 167

DATEIBY
11. SUCTION LINE STRAINER INSTALLED . MESH.
12. SUCTION LINE STRAINER TABBED.
13. HORIZONTAL SUCTION LINE REDUCER, IF USED, IS
ECCENTRIC, FLAT SIDE UP.
14. 3/4 INCH VALVED CONNECTION ON EACH SIDE OF
STRAINER.
15. PIPE FLANGE RATINGS: SUCTION INCH I LB.
DISCHARGE INCH. LB.
16. DISCHARGE LINE INCREASER. IF USFD, IS
CONCENTRIC.
17. DISCHARGE CHECK VALVE INSTALLED, FLOW
DIRECTION CORRECT.
18. VALVED BYPASS AROUND CHECK VALVE. (FOR HOT
SERVICES).
19. CHECK VALVE DRILLED IF NO BYPASS IS INSTALLED
IN HOT SERVICES.
20 * ONE INCH VALVED WARM-UP LINE BETWEEY DISCHARGE
AND SUCTION LINES.
21. DOUBLE BLOCK VALVED LINES HAVE BODY DRAIN VALVES
IN BLOCK VALVES OR VALVED DRAIN Ir! SPOOL BETWEEN
BLOCK VALVES I
PIPE NIPPLES THREADED ON ENDS ONLY.
22 I
23. NO PIPE BUSHINGS.
MIN IMUM .
24 I CARBON STEEL PIPE SCH 160, 1/2 INCH NPS
25 I STAINLESS STEEL PIPE SCH 80S, 1/2 INCH NPS
MINIMUM.
PIPE NIPPLES AT BRANCH CONNECTIONS GREATER
26 I
THAN 2 INCH LONG BUT LESS THAN 4 INCH LONG.
27. PIPING HIGH POINTS HAVE VALVED VENTS.
28. LOW POINTS. GAUGE GLASSES AND PRESSURE GAUGES
HAVE VALVED DRAINS.
29. BLOCK VALVES INSTALLED BETWEEN INSTRUMENT AND
LINE.