Wrapping it is a good idea. It not only keeps the heat inside the pipe, but it stops stuff around it from heating up.
Custom Exhaust Riser/Mixing Elbow
- Thread starter JK_Boston_Catalina310
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Every party has a pooper
Sorry to be the one but be advised galvanized pipe is verboten for use in the hot section (before water injection) according to the ABYC Standard P-1, Table 1 and by adoption verbatim, the USCG.
Point being, your wet exhaust system is wet only after raw water injection. Before that, it's a dry exhaust and has different requirements. Worse yet, the fumes from the galvanizing zinc during off-gassing are, to be polite, toxic; to be accurate, they're potentially deadly.
Be safe my friends.
Sorry to be the one but be advised galvanized pipe is verboten for use in the hot section (before water injection) according to the ABYC Standard P-1, Table 1 and by adoption verbatim, the USCG.
Table 1 on page 4 of the standard, Dry Exhaust Materials for Diesel Engines (same for gas engines) allows the following: aluminized steel, carbon steel, nickel-iron chrome and stainless steel (type 316L - low carbon). No galvanized, no brass, no bronze.
Point being, your wet exhaust system is wet only after raw water injection. Before that, it's a dry exhaust and has different requirements. Worse yet, the fumes from the galvanizing zinc during off-gassing are, to be polite, toxic; to be accurate, they're potentially deadly.
Be safe my friends.
Got the new riser/mixer from the fab shop early this morning. It looks nice and is heavy and solid feeling. All stainless. They re-used the coupling for where it connects to the exhaust manifold and they cleaned and re-used the nipple for the raw water coming out of the heat exchanger. The cost for the parts and for the shop to weld it together was $260.
We wrapped it in an off-the-shelf exhaust wrap from Advanced Auto ($23 for 1" x 15') and then wrapped that in a foil looking exhaust tape ($12 for 1" x 15'). May have to get some stainless safety wire to wrap it up as that foil tape seems to be coming off.
It only took about 10 minutes to wrap it and install it. Worked perfectly!!!!
Very happy to have this working.
Pictures attached.
Cheers,
Jim
We wrapped it in an off-the-shelf exhaust wrap from Advanced Auto ($23 for 1" x 15') and then wrapped that in a foil looking exhaust tape ($12 for 1" x 15'). May have to get some stainless safety wire to wrap it up as that foil tape seems to be coming off.
It only took about 10 minutes to wrap it and install it. Worked perfectly!!!!
Very happy to have this working.
Pictures attached.
Cheers,
Jim
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