Tores mailbox VIIC and VIIC/41 operation and technical details

[tore]

Simon.
The aux. luboil pump suction pipes from the luboil system and storagetanks seems OK to me.
Tore
 

[NZSnowman]

Simon
Luboil system
Further to my remark on the hand lub oilpump, I guess you shall find the dischargepipe from the hand pump has a smaller diameter until it enters the pipeline from the aux. luboil pump to the distributionchest port and starboard main engine system.
Tore

Tore, just checking are you talking about this section of pipeing (Orange smaller diameter & Red larger diameter pipes)?

[tore]

Simon.
Yes this is the system . In addition you have of course the other small diameter pipes taking hand pump suction from the luboil storagetanks port and starboard as shown on the sketch below.
tore

[NZSnowman]

Update of Cooling Water Piping

• Corrected piping alignment.
• Remove red painted handles.

[tore]

Simon.
 Looks fine, you have probably the seaweedblowing on another layer.
Tore

[NZSnowman]

Fig. 1. Below deck.


Fig. 2. Above deck.

Breaking the laws of physics! 

Just realise that the pipe going to the oil tanks were occupying the same space as a cooling water pipe so I have fixed the alignment.

[NZSnowman]

Simon.
 Looks fine, you have probably the seaweedblowing on another layer.
Tore

Have yet to add this layer (seaweed blowing) to the drawing, for some reason I have been putting it off 

[NZSnowman]

Updated lines to and from LO Hand Pump

• Corrected the diameter of the piping.
• Corrected pipe alignment around the LO Hand Pump.
• Corrected pipe alignment to LO Tanks.

[tore]

Simon
This pipe lay out should work. The distribution chest midship ( luboil to port and starboard engines) is a nightmare of pipes stacked on top of each other. It shall be  a challenge to accommodate the dischargepipe from the aux. luboil pump into this crows nest.
Tore

[tore]

Luboil handpump suction from storage tanks.
I am not 100% sure, but I assume the smaller suctionpipes of the handpumps connects to the main suction pipes from port and starboard storagetanks somewhere before the two portside valves shown on the picture below, the two small suctionpipes goes to the stb and comes up underneath the black table (driptray) just below the handpump. I guess you should find the changeovercock ( port/stb storagetanks) right under the table as well.
Tore

[NZSnowman]

Tore, here my estimate (in red) of the suction lines from the post & starboard to the LO Hand Pump with valve

[tore]

Simon.
I guess the chief pipelayout engineer would have approved this . Just a maintenance remark, the gatevalve in the seawater crossover pipe has to have access for being removed. I haven`t seen the sideview drawing, but just be aware that nuts and bolts need space when being removed, so place the pipeconnections bearing that in mind.
Tore

[NZSnowman]

Simon.
I guess the chief pipelayout engineer would have approved this . Just a maintenance remark, the gatevalve in the seawater crossover pipe has to have access for being removed. I haven`t seen the sideview drawing, but just be aware that nuts and bolts need space when being removed, so place the pipeconnections bearing that in mind.
Tore

Hi Tore

This morning while realigning the pipes that runs to the LO tanks around the gate valves in the seawater crossover pipe I noted they wrong. I previously believe these pipes went over the cooler, but they run under the cooler. Below are the update drawings.

Q1. How often would you need to remove or have need access to the gate valve in the seawater crossover pipe?

Q2. Would the handle be removed on valve

[tore]

Simon.
This is better. Gatevalves are very reliable and for routine maintenance I would estimate 6 years between each dismantling, however the rule is that for essential valves you should be able to open up and repair whenever nessecary. the C2 handle is removable and would cause no problem..
Tore

[tore]

Simon
Luboil filters.
Knife filters previously discussed.
Your question of today. The  knife filters are not only fuelfilters, but are sometimes used for finer  filtration of luboil. On the picture below you see a larger modern filter having an electric motor on the top doing the rotation. In the case of marine execution in the 1940 years I guess this would be carried out by a handle on the top.
Tore