High pressure gas line

Thomas/NH wrote:
Right you are... Just because some type of modifications may work, it doesn't make it legal...

You can't use soft metals (copper or aluminum) on trailers because of flying objects (stones and like). It's either black iron or rubber now days. Copper can only be used if it is in a shield (conduit) and it does not mix well with salt and other road chemicals.

Thanks for your clarification, reinforces what I thought I always knew ... not an advisable modification for anyone. ;)

SoundGuy wrote:

Thomas/NH wrote:
The reason they don't run high pressure any distance is because liquid propane can get into it and not be able to evaporate and clog the regulator (freeze it). That's why the regulators are kept close to the tanks and above the liquid line. Remember, you can't urn liquid only vapor.

I'm a licensed gas technician.

Sounds like a reasonable explanation but that suggests that the OP's mod wouldn't meet some sort of code requirement, whether federal or RVIA or whatever. Back when we owned our KZ Spree I split one the tank feeds and ran a hose back to the curbside area of the trailer where I spit it again with a Marshall T, using one leg to feed a stand alone 2-burner Coleman camp stove and the other leg to feed my Weber Q grill with an additional 25' length hose. This however was temporary as I'd set it up each time, as I remember a warning that came with the tank T warning it was not to be installed permanently and just left on the tank with the hose connected to it, running back along the underside of the trailer. I thought it might have been because the hose was rubber, not metal pipe, but these days many newer trailers including mine now do use rubber hose to run low pressure from the regulator output back to a splitter located on the underside of the trailer where multiple feeds are then run out to the various locations in the trailer ... so clearly metal pipe is no longer required by code for this task. However, this is a low pressure feed running through that hose, not high pressure. Unless someone can point to documentation that proves otherwise I'm thinking that running a high pressure tank feed along the underside of the trailer as the OP has done does not meet code and would be ill advised.

Right you are... Just because some type of modifications may work, it doesn't make it legal... Should there ever be an accident and the investigator inspects your work and finds you haven't followed the rules, you will be held accountable both civil and criminal. Better read your insurance policy.

You can't use soft metals (copper or aluminum) on trailers because of flying objects (stones and like). It's either black iron or rubber now days. Copper can only be used if it is in a shield (conduit) and it does not mix well with salt and other road chemicals.

BTW: Don't be fooled with the thought "I'll just shut off the gas while traveling"... Any major accident will bring in the inspector and if he finds any code violations, your goose is cooked.

Thomas/NH wrote:
The reason they don't run high pressure any distance is because liquid propane can get into it and not be able to evaporate and clog the regulator (freeze it). That's why the regulators are kept close to the tanks and above the liquid line. Remember, you can't urn liquid only vapor.

I'm a licensed gas technician.

Sounds like a reasonable explanation but that suggests the OP's mod wouldn't meet some sort of code requirement, whether federal or RVIA or whatever. Back when we owned our KZ Spree I split one the tank feeds and ran a hose back to the curbside area of the trailer where I spit it a second time with a Marshall T, using one leg to feed a stand alone 2-burner Coleman camp stove and the other leg to feed my Weber Q grill with an additional 25' length hose. This however was temporary as I'd set it up each time, as I remember a warning that came with the tank T warning it was not to be installed permanently and just left on the tank with the hose connected to it, running back along the underside of the trailer. I thought it might have been because the hose was rubber, not metal pipe, but these days many newer trailers including mine now do use rubber hose to run low pressure from the regulator output back to a splitter located on the underside of the trailer where multiple feeds are then run out to the various locations in the trailer ... so clearly metal pipe is no longer required by code for this task. However, this is a low pressure feed running through that hose, not high pressure. Unless someone can point to documentation that proves otherwise I'm thinking that running a high pressure tank feed along the underside of the trailer as the OP has done does not meet code and would be ill advised.

Thomas/NH wrote:

SoundGuy wrote:

Vintage465 wrote:
So I completed the installation of a 3/8" stainless steel tubing h.p. line from the propane tank to the gas grill location.

Take this for what it's worth :W - but I'd question whether running a high pressure gas line along the underside of the trailer meets code. :h All trailers I've ever seen first regulate at the tank then send low pressure along that line ... even Fleetwood's regulated high pressure feed as used on some of their popups was created by regulating tank pressure down to ~ 16 p.s.i. at the tank and splitting it off with a T to send to the curb side of the trailer for connection to a regulated high pressure stove. The second leg of that regulated T was then regulated a second time down to low pressure and fed to the rest of the trailer. If running full tank pressure which can be anywhere from 80 to 200 p.s.i. met all code requirements then why are no trailer manufacturers doing this? :h

The reason they don't run high pressure any distance is because liquid propane can get into it and not be able to evaporate and clog the regulator (freeze it). That's why the regulators are kept close to the tanks and above the liquid line. Remember, you can't urn liquid only vapor.

I'm a licensed gas technician.

I often wondered why portable tanks are always mounted upright. Now I know.

SoundGuy wrote:

Vintage465 wrote:
So I completed the installation of a 3/8" stainless steel tubing h.p. line from the propane tank to the gas grill location.

Take this for what it's worth :W - but I'd question whether running a high pressure gas line along the underside of the trailer meets code. :h All trailers I've ever seen first regulate at the tank then send low pressure along that line ... even Fleetwood's regulated high pressure feed as used on some of their popups was created by regulating tank pressure down to ~ 16 p.s.i. at the tank and splitting it off with a T to send to the curb side of the trailer for connection to a regulated high pressure stove. The second leg of that regulated T was then regulated a second time down to low pressure and fed to the rest of the trailer. If running full tank pressure which can be anywhere from 80 to 200 p.s.i. met all code requirements then why are no trailer manufacturers doing this? :h

The reason they don't run high pressure any distance is because liquid propane can get into it and not be able to evaporate and clog the regulator (freeze it). That's why the regulators are kept close to the tanks and above the liquid line. Remember, you can't burn liquid only vapor.

I'm a licensed gas technician.

Vintage465 wrote:
So I completed the installation of a 3/8" stainless steel tubing h.p. line from the propane tank to the gas grill location.

Take this for what it's worth :W - but I'd question whether running a high pressure gas line along the underside of the trailer meets code. :h All trailers I've ever seen first regulate at the tank then send low pressure along that line ... even Fleetwood's regulated high pressure feed as used on some of their popups was created by regulating tank pressure down to ~ 16 p.s.i. at the tank and splitting it off with a T to send to the curb side of the trailer for connection to a regulated high pressure stove. The second leg of that regulated T was then regulated a second time down to low pressure and fed to the rest of the trailer. If running full tank pressure which can be anywhere from 80 to 200 p.s.i. met all code requirements then why are no trailer manufacturers doing this? :h

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