E Z Peaces wrote:
Ned Simmons wrote:
On Mon, 01 Dec 2008 14:25:33 -0500, E Z Peaces

wrote:

Ned Simmons wrote:
On Sun, 30 Nov 2008 14:58:54 -0500, E Z Peaces
wrote:

The cylinders are a mystery. Seeing only a grayscale picture,
the
trucker identified the tank near the passenger door as
refrigerant. He said that's where service trucks carry it. Its
color corroborates this. Why would a pipeline welder carry
refrigerant?

The truck has welding hose on a reel beside the spare tire, but
I
see no cylinders marked for acetylene or industrial oxygen.
Could he get anyone to put anything but medical oxygen in a tank
marked for medical oxygen? Carrying highly compressed gas in
loose cylinders looks very dangerous.
How have you concluded that the tanks do not contain welding
gases? In the US there's no standard color code for gas
cylinders.
The standup tank behind the passenger door looks like a fuel gas
cylinder (MAPP if I had to guess), and there's no reason the
green
tanks lying down in the bed can't be welding oxy.

When you hear hoofbeats, think horses, not zebras.

MAPP isn't used for welding. It makes steel brittle.

There's an arc welder on the truck. The fuel gas is for cutting and
heating, perhaps for bevelling pipe.

OSHA 29 CFR 1926.350(a)
(4) "When cylinders are transported by powered vehicles, they
shall
be secured in a vertical position".


DOT CFR 177.840 (1)
(1) Cylinders. To prevent their overturning, cylinders containing
Class 2 (gases) materials must be securely lashed in an upright
position; loaded into racks securely attached to the motor
vehicle;
packed in boxes or crates of such dimensions as to prevent their
overturning; or loaded in a horizontal position. Specification
DOT-4L cylinders must be loaded in an upright position and
securely
braced.

You've never seen OSHA or DOT regs ignored? Wouldn't those rules be
applicable to the gases you proposed?


I doubt the rules would apply to empty cylinders.

I don't know if there are welders who would consider it acceptably
safe to transport filled cylinders loose, but wouldn't it also be
inconvenient? When he wanted to weld, he would have to lift an
oxygen
cylinder from the truck and find a place to secure it upright.

Why would he have to secure an oxygen cylinder upright in order to
weld? Oxygen doesn't care what the orientation of the cylinder is.

--
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--John
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(was jclarke at eye bee em dot net)