Hi all,
I have a question regarding PET regs. I have noticed this a number of times, but I keep forgetting to ask.
I understand the need for certain regulations on tanker (fuel) trucks. Sealed electrics, engine opening behing cab, etc, to stop sparks, but why do they need metal wheelarches? I have noticed that it only seems to be the tractor units that have this, with alot of rigid tankers (fuel) having plastic.
Many thanks, and sorry about the odd question.
NB
the metal mudwings are fitted in place of the plastic ones, because a static charge can build up on the plastic ones and cause a massive discharge spark, whereas the metal ones are earthed and any static is safely transferred away 
HTH
B…
Bungle666:
the metal mudwings are fitted in place of the plastic ones, because a static charge can build up on the plastic ones and cause a massive discharge spark, whereas the metal ones are earthed and any static is safely transferred awayB…
so why do the ridged ones have plastic 
nick2008:
Bungle666:
the metal mudwings are fitted in place of the plastic ones, because a static charge can build up on the plastic ones and cause a massive discharge spark, whereas the metal ones are earthed and any static is safely transferred awayB…
so why do the ridged ones have plastic
now that i do not know, but thats what i was told on my ADR tanks course!!
B…
nick2008:
so why do the rigid ones have plastic
FTFY… Some trailers have plastic ones, thought it was down to penny pinching!?
I thought it was to contain a tyre after a blowout never thought about static
Cronus:
I thought it was to contain a tyre after a blowout never thought about static
that’s what I thought as on the ■■■ end you have pipe holders etc providing additional protection
Thanks guys. Makes sense about the static. Just odd how some have metal, some plastic.
Thanks again.
NB
If pet regged wheel arches should be metal or flame proof fibreglass (could look plastic), to protect tank from a wheel or brake fire.
dont know about now but certainly up to 1998 Shell had plastic mud wings on both tractor and trailers both on motor spirit and LPG 
I suppose it’s down to what your Hazchem trainer told you if the question was asked. Back in the day I was told that metal mudguards were used because in the event of a tyre fire they would hinder damage to the haz placards which are invariably placed directly above the drive axle (or near enough as to make no difference).
This Trailer was New in January 2015 and the Unit was new January 2014.
You may be able to see that the Unit has metal mudguards and the Trailer ones are plastic.
I’m sure that they both meet the regulations.
fodentanker:
This Trailer
#Cobo:grin:
Is there a set age of vehicles that should have metal mudguards, or is it all fuel tanker units? I ask as I saw a 57 plate ERF(MAN) yesterday with a fuel tanker in tow, and the unit had standard MAN style plastic mudguards.
NB
DieselDave?
Er… BKing 
