©2009 Armstrong International, Inc. armstronginternational.com COIL PIPING BEST PRACTICES Jim Smith...
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Transcript of ©2009 Armstrong International, Inc. armstronginternational.com COIL PIPING BEST PRACTICES Jim Smith...
©2009 Armstrong International, Inc.armstronginternational.com
COIL PIPING BEST PRACTICESCOIL PIPING BEST PRACTICES
Jim Smith – CEM
Product Mgr.AHTG
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
2“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
GENERAL GUIDELINES
1) TRAP EACH COIL SEPARATELY. NEVER MASTER TRAP.
2) AVOID MIXING HP AND LP STEAM COILS IN COMMON RETURN HEADER. DRAIN LP COILS TO RECEIVER and PUMP RETURN TO HP RETURN WITH PUMP TRAP.
3) AVOID OVERSIZING STEAM CONTROL VALVES. VERIFY RANGE OF GENERAL SERVICE CONDITIONS AND STEAM/CONDENSATE LOADS. OVERSIZING CONTROL VALVES LEADS TO “HUNTING”, POOR RESPONSE AND POOR CONTROLABILITY. USE SPLIT RANGE OR 1/3-2/3 TYPE CONTROL VALVE OPTIONS FOR WIDELY VARYING LOAD CONDITIONS.
4) DO NOT REDUCE CONDENSATE OUTLET PIPING AND AVOID ELBOWS. USE CROSSES/TEES TO HELP NON-CONDENSABLES TO KEEP MOVING.
5) INSTALL AIR VENTS AND VACUUM BREAKERS WHENEVER POSSIBLE WITH FULL PORT ISOLATION VALVES TO ALLOW FOR SERVICING WITHOUT SHUTTING DOWN COIL OPERATION.
6) EVALUATE RETURN HEADS AND BACK PRESSURES TO ALLOW FOR GRAVITY DRAINING OF COILS VS RETURNS AGAINST BACK PRESSURES. EVALUATE WATER HAMMER POTENTIAL.
7) INSURE SHUTDOWNS OR RETURN AGAINST HEADS/BACK PRESSURES. UTILIZE PUMP TRAPS, SAFETY DRAINS, GRAVITY DRAIN OPTIONS AND/OR POSI-PRESSURE CONTROLLERS.
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
3“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
Air Vent
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
4“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
NOTES:
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
5“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
Air Vent
Some Valving/Fittings Not Shown for Clarity!
MAINTAIN FULL CONDENSATE OUTLET LINE SIZE TO TRAP REDUCING “T”!
X
SUGGEST FULL PORT ISOLATION VALVE HERE! (Normally OPEN)Maintain Full Condensate Outlet Line Size to Reducer!
REFER TO ARMSTRONG PUMP TRAP GUIDELINES FOR CLOSED LOOP OPTIONS!
Secondary VB – Shutdown Only!
Primary VB
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
6“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
STEAM TRAP SELECTIONGeneral Guidelines – DO NOT MASTER TRAP!
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
7“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
Pump Trap Option draining Single Air Preheater Coil.- Still No Air Vents off Coil and Reducers in-line before trap take-off
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
8“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
Armstrong : Posi-Pressure Control System“ The SMART Vacuum Breaker”
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
9“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
SINGLE COIL CLOSED LOOP with ARMSTRONG ‘DOUBLE DUTY’ PUMP TRAP
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
10“Expect many enjoyable experiences!”
David M. Armstrong
®
GENERAL PIPING – STEAM COILSGENERAL PIPING – STEAM COILS
Full System Example
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
11“Expect many enjoyable experiences!”
David M. Armstrong
®
Armstrong’s PromiseArmstrong’s Promise
We provide intelligent system solutions that improve utility performance, lower energy consumption, and
reduce environmental emissions . . . while providing an “enjoyable experience!”
Intelligent System Solutions S T E A M • A I R • H O T W A T E R
11“Expect many enjoyable experiences!”
David M. Armstrong
®