PVC Exhaust

Thats the daftest post so far Micheal --are your trying to tell us something.

If your not familiar with water cooled exhaust systems this little item here made by Vetus explains what happens if you dont have a thorough mix of water and exhaust.

http://www.vetus-shop.com/vetus-exhaust-gas-mixer-swirler-for-hose-125mm-p-584.html

My engines are Yanmar the RR of marine engines that have mixer elbows that work. If your engines dont then it is likley you will need more robust or even stainless systems when using agricultural engines.

 

Im familiar with both water injected exhaust, exhaust systems and THE RULES

 

You cannot 'field' test critical components on a commercial or leisure vessel in operation putting crew/passengers at risk, thats the whole point of using IMO and classification society/marine industry standard approved parts & plant.

Shipyards/boat builders basin trial then sea trial new vessels to ensure ships systems, engine speed, temps/exhaust pressure, boat speed, dBh, alarms etc all function to requirements.

There is no such animal as a ships systems 'in field' test being carried out by a yard or builder on a client vessel, as you well know all renown brand OEM test their products before releasing on the market.

Only cheats and fools would put boat operators crews/PAX at risk with substitute unproven products.

 

If you believe Yanmar (8/10) are the RR of marine high speed diesel engines then, Frosty old son you need to get out more

 

Its a shame.

Some DIY , home builders can work to very high standards and produce a product better than production built.

Some DIY , home builders employ mickey mouse engineering and shortcuts that degrade the image and value of all Home built boats.

 

Thanks for your input I thought you would have known that answer.

http://siliconmarine.com/ExhaustTempManual.pdf

Here is a marine water cooled exhaust temp sensor manufacturer. The say their temp switches are set to 137 degrees to alert the driver that damage will occure.

According to FMS and his impressive link from Vinidex my pipes are rated to 176 F.

I consider this satisfactory. I have 10 Alarms per engine.

 

That is very true Micheal,--would YOU know the difference.

Perhaps you think I should run the engine for 2 minutes without oil in it too, just to check the oil guage.

An alarm is meant to alert you to stop Only a dork drives on and would deserve what he will get.

There are no "rules" as you say to do such a silly thing

Post a link on what you think you have seen on the internet.

 

If boat owner uses non marine quality materials or unproven products in critical engine managment you might as well remove all alarm sensors, they tell you the event has begun.

Professionally made synthetic woven exhaust systems by reconized OEM like Powerflow, Halyards use Vinylester resin having temp range to 300C for safety margin

A few miles off shore, weather turning foul, seas rising 3mt waves and then alarm sounds because exhaust system has failed, cooling water is flooding the bilge not going outboard, bilge alarms sounds, ER is filling with fumes, exhaust back pressure drops, engine rpm overuns, power dropping, engine over heats, lube oil lights up - maybe a broach then engineroom flooded

 

Climb down from your tree Frosty, tap your query into google then learn how to read..

You can find hundreds of documents on Marine wet exhaust system design and regulations

Your system , from beginning to end, fails EVERY regulation.

" 9.1.2.1 Every exhaust system fitting, joint, clamp, and support shall be accessible. All hose connections shall be double clamped. "

Purchase some more hose clamps Frosty.

" 9.1.2.2 Exhaust system piping, components and connection shall be independently supported to minimize failure from vibration, shock and expansion. "

Purchase some pipe hangers Frosty

9.1.2.7 No additional discharges other than cooling water shall share the exhaust gas passage.

Eliminate that goofy drain on the elbow Frosty


"9.1.3.3 Non-metallic exhaust system components shall retain watertight integrity for two (2) minutes after a total loss of cooling water with the engine operating at full power."

Chop all your PVC junk out and purchase appproved hose Frosty


http://www.tc.gc.ca/eng/marinesafety/tp-tp1332-section9-960.htm


And Frosty...get off your *** and do your own research

 

Frosty,

I believe you are saying water cannot get hotter than 100 degree Celsius.
All the discussions of the plastic softening and melting temperature is being discussed in Fahrenheit. Water boils at 212 Fahrenheit. However once it gets to be steam, it can still be increased in temperature - this is known as "superheat" and steam exposed to exhaust gas certainly could be superheated.

I personally don't know if it actually would superheat but still steam at 212 is higher than the melt temp for PVC at 176 F.

Wikepedia has too many mistakes to be using as a quote but here goes. http://en.wikipedia.org/wiki/Superheated_steam.

Steam plants which feed a turbine for power or propulsion use superheated steam due to increased energy and to keep water from hitting turbine blades and eroding them.

 

I used the term can not get hotter than water to get the flat earth society to think. They were talking of flames and hot exhaust melting the PVC polymer at idle and saying "It wont get out of the dock". Obviously this is not the case or we would not have wet exhausts.

Thanks for the info though

 

Frosty,

I don't know who the Flat Earth Society is in this case.
Please actually tell us the results of this out of the box experiment.

Somehow I don't think there will be a report.
Personally I expect this to fail, perhaps not at idle, but that still could happen.

The only thing this has going for it is that turbo's take energy out of the exhaust.

It sure is a pity when people take your comments for real when you never really meant them.

 

Your way at the back --please re read the thread.

Im sorry but I can keep repeating myself, All you qeries are answered.

 

These fittings look like PVC glassed over. Their sharp angle bends are appaling.

http://www.ebasicpower.com/c/ALL5A/Fiberglass Exhaust Fittings

This one below is so shiny yet so badly made I can barely believe it. This exhaust is out into the flat face of a butterfly valve and then back on itself down a pipe again with no radius this is a power robbing mess.

http://www.parkerfabrication.com/marine-exhaust

These again are 3 angle 90 degree bends. This is rubbish, far inferior to mine.

http://store.wardmarine.com/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=WMOS&Category_Code=EF


This site confirms that wet exhaust are good for 120C where as my polymer PVC sepecifications are for 137c.

http://siliconmarine.com/ExhaustTempManual.pdf

I shall be removing my pipes shortly after this post to photo the inside and to show the perfect white colour with no distortion what so ever on the inside. I shall then proceed to glass over the outside to keep veiwers and ameteurs happy by making them look like a bought one only with perfect radius bends

 

Have to agree with you Frosty, the products illustrated on these site are bloody awful, I would reject them without hestitation.

Re. shiny pipes - judging by the weld and metal colour it looks more like chrome plated WST steel tube not s/steel, weld indicates very thin material plus the illustrated assembly is up shitters ditch with the hose connection under load thru bad alignment.