管路冲洗指导
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CONTENT 目录
1.General and purpose 总括及目的: (3)
2.Water flushing 水冲洗 (4)
3.Chemical cleaning 化学清洗 (6)
4.Oil flushing 串油 (7)
5. Nitrogen / compressed air purge 氮气、压缩空气清洗 (8)
6. Inspection & records 报验与记录 (8)
7. Safety 安全 (8)
举例
Assuming that the pipe is 3” diameter, d= 0.075m
假设管子直径为3英寸，d= 0.075m
Therefore, cross sectional area of pipe = πd2/4
= [3.142 x (0.075)2 ]/4
= 0.00442 m2
因此截面积为= πd2/4
= [3.142 x (0.075)2 ]/4
= 0.00442 m2
pump capacity, Q = 2000 l/min = 0.0033m3/s
泵的最小排量，Q = 2000 l/min = 0.0033m3/s
Therefore, Velocity V = Q / A
= 0.033 / 0.00442
= 7.466 m/s
因此，最小流速为V = Q / A
= 0.033 / 0.00442
= 7.466 m/s
Verification of cleanliness, internal visual inspection, use of boroscope, video etc.
Not less than 10% boroscope, if not acceptable more lines are required to be
Inspected.
报验管线内清洁度，需要使用管道内窥镜，录像等。最少要检查10%的管线长度，如果10%的管线长度内不被接受，可以要求更多的管线长度进行内窥镜检查。
Piping System Cleaning And Pressure Testing
Piping System Matr.
Water
Flush
Air
Flush
Degrease
Standing
Leak
Test
Pressure
Test
N2
Test
Retro
Jet
Chem.
Clean
Hot
Oil
Flush
Preserve
Boro
Scope
Remarks
1 Fire Water Galv. × × Drain pockets. Dump Water
2 Draft and
Inclination
Monitoring
SS × ×
3 Remote
Sounding
SS × ×
4 Tank Vent Galv. × Dump after test to flush
5 Haz Bilge and
Drain
MS × ×
Dump
Water
6 Exhaust Gas
and Air Intake
MS ×
7 Instrument Air SS × ×
8 Fresh Water
Cooling
MS × × × ×
Apply
additives to
water
9 Non
Hazardous
Bilge and
Drain
MS × ×
Dump
Water
10 Waste Oil And
Oily Water
MS × ×
Drain and
blow dump
water
11 Bilge And
Drain
MS × ×
Drain and
blow dump
water
12 Ballast GRP × × × Dump Water
13 Hydraulic Oil
Ringline/HPU's
SS × × × × ×
Fill system
with oil after
flushing
14 Hydraulic Oil
system for
closing
appliances
SS × × (×)
Valves,
doors,
check NA
class
15 Quick Closing
Valve
Galv. × × Blow dry
16 Starting Air Galv. × × Blow dry
17 General Air Galv. × × Blow dry
18 Sea Water
Cooling
Galv. × ×
19 Sea Water
Service
Galv. × × ×
Dump
Water
20 Lub Oil MS × × × ×
21 Fuel Oil MS × × (×) × Blow dry
22 Steam MS × × Blow dry
23 Chilled Water SS × ×
24 HP Air SS × × × Blow dry
25 Water Mist SS × × Blow dry