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29 CFR 1910 Subpart H Hazardous Materials. 1910.101 Compressed gases (general requirements). "Compressed gas" means:. 2.3…any material or mixture of gases having in a container either an absolute pressure exceeding 40 psi at 70 deg. F. or

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29 cfr 1910 subpart h hazardous materials

29 CFR 1910 Subpart H Hazardous Materials

1910.101

Compressed gases (general requirements)

compressed gas means
"Compressed gas" means:

2.3…any material or mixture of gases having in a container either an absolute pressure exceeding 40 psi at 70 deg. F. or

an absolute pressure exceeding 104 psi at 130 deg. F or both or

any liquid flammable material having a Reid vapor pressure exceeding 40 psi absolute at 100 deg. F

See other definitions at 49 CFR 173.115

29 CFR 1910.1200

compressed gas cylinder types
Compressed gas cylinder types

Comparative sizes

High Pressure Low Pressure

compressed gas cylinder types high low acetylene cryogenic

Fusable

Plug

.

.

Porous

Mass

Acetone

Solvent

42%

Volume

.

.

Fusable

Plug

Compressed gas cylinder typesHigh Low Acetylene Cryogenic

> 900

PSIG

Vapor

AR

O2

H2

N2

Very

Very

Cold

Liquid

CO2

CL2

NO2

< 900

PSIG

acetylene cylinders

Fusable

Plug

.

.

Porous

Mass

Acetone

Solvent

42%

Volume

.

.

Fusable

Plug

Acetylene cylinders

The decomposition characteristics of acetylene gas are avoided:

  • By providing a porous mass packing material with minute cellular spaces
  • No pockets of appreciable size remain where “free” acetylene in gaseous form can collect
  • This porous mass is saturated with acetone, or other suitable solvent, in which the gaseous acetylene actually dissolves
acetylene cylinders6

Fusable

Plug

.

.

Porous

Mass

Acetone

Solvent

42%

Volume

.

.

Fusable

Plug

Acetylene cylinders

These two features – porous filler and solvent

Allows acetylene to be contained at moderate pressure without danger of explosive decomposition

Maximum cylinder pressure is 250 PSIG at 70 degrees F. with a variation of about 2.5 PSI rise or fall for each degree rise or fall in temperature

Do not exceed 15 PSI pressure on free acetylene

slide7

OSHA STANDARDS

29 CFR 1910 General Industry

Specific OSHA regulations applying to compressed gas cylinders

1910.253 Oxygen-fuel gas welding and cutting

1910.101 Compressed gases

101 a inspection of compressed gas cylinders
101(a) Inspection of compressed gas cylinders
  • Each employer shall determine thatcompressed gas cylinders under his control are ina safe condition to the extent that this can be determined by visual inspection...

Compressed gas industry safety information directs end users to examine any cylindersreceived

gas suppliers advise end users to
Gas suppliers advise end users to
  • Check cylinders as they are received
  • Verify that labels, tags and shipping papers are appropriate
  • Reject and return cylinders with obvious damage
  • Determine that required caps and plugsare in place
slide10

1910.101 - Compressed gasesGeneral requirements

Applicable to

Suppliers

and

distributors

filling compressed

gas

cylinders

(a)Inspection of compressed gas cylinders…

…visual and other inspections (perDOT49 CFR 171 – 179andCGA C-6 & C- 8)

slide11

Compressed Gas Association Inc.

CGA C-6 1968

3.2.6 - Bulges Cylinders are manufactured with reasonably symmetrical shape. Cylinder which have definite bulges shall be removed from service

Bulged - cylinder wall failure

slide12

Compressed Gas Association Inc.

CGA C-6 1968

Cylinder burst after fire exposure

5.3.7 - Fire Damage

Cylinders shall be carefully inspected for evidence of exposure to fire

Charring or burning of paint

Burning or scarfing of the metal

Distortion of the cylinder

Melted out fuse plugs

Burning or melting of valve

slide13

Burn

Gouge with deposit of weld metal

slide14

Gouge

Cut

Reducing wall thickness - increasing stress

slide16

101(b) "Compressed gases."

The in-plant handling, storage, and utilization of all compressed gases in cylinders, portable tanks, rail tankcars, or motor vehicle cargo tanks shall be in accordance withCompressed Gas Association Pamphlet P-1-1965,which is incorporated by reference as specified in Sec. 1910.6

slide17

1910.101(b)

  • The in-plant handling storage and utilization of all compressed gases in cylinders…shall be in accordance with Compressed Gas Association
  • Pamphlet P-1 1965...

This includes most

industrial and commercial facilities

Pamphlet P - 1 1965

section 3 1 general
Section 3.1 General

3.1.14 Never tamper with the safety relief devices in valves or cylinders

3.1.15 Never attempt to repair or to alter cylinders, valves, or safety relief devices.

section 3 1 general19
Section 3.1 General

3.1.16Never use cylinders as rollers, supports, or for any purpose other than to contain the content as received

Big &

heavy

section 3 1 general20
Section 3.1 General

3.1.17 Keep cylinder valve closed at all times, except when the cylinder is in active use.

3.1.18 Notify owner of cylinder if any condition has occurred which might permit any foreign substance to enter the cylinder or valve giving details and cylinder serial number.

section 3 1 general21
Section 3.1 General

3.1.19

Do not place cylinders where they might become part of an electric circuit.

When the cylinders are used in conjunction with electric welding, precautions must be taken against accidentally grounding compressed gas cylinders and allowing them to be burned by electric welding arc.

Insulator

slide22

Section 3.2 Moving Cylinders

  • Caps in place
  • Lifting
  • Dropping
  • Lifting with magnets
  • Dragging
section 3 2 moving cylinders
Section 3.2 Moving Cylinders

3.2.2 Do not lift cylinders by the cap.

3.2.3 Never drop cylinders nor permit them to strike against each other or against other surfaces violently.

Concrete

slide24

Electro-magnet

3.2.4 Never handle a cylinder with a lifting magnet.

3.2.5 Avoid dragging or sliding cylinders.

section 3 2 moving cylinders25
Section 3.2 Moving Cylinders

3.2.6

Use suitable hand truck, fork truck, roll platform or similar device with cylinder firmly secured for transporting and unloading.

!

3 3 storing cylinders
3.3 Storing Cylinders
  • Local Regs
  • Posting
  • Separation (different types)
  • Separation (charged & empty)
  • Storage rooms
  • Highly flammable substances
  • Avoid dampness
  • Protection of cylinders
  • Care of cylinders

?

3 3 storing cylinders27
3.3 Storing Cylinders

Fire is a threat to containment!

3.3.6

Do not store cylinders near highly flammable substances such as oil, gasoline or waste.

MEK

3 3 storing cylinders28
3.3 Storing Cylinders

3.3.8

Protect cylinders from any object that will produce a cut or other abrasion in the surface of the metal….

?

3 3 storing cylinders cont d
3.3 Storing Cylinders Cont’d

3.3.8….

Do not store cylinders near elevators or gangways, or in locations where heavy moving objects may strike or fall on them….

?

slide30

At gas manufacturers and distributorsnot user work sites, proper nesting is considered safe storage by the compressed gas industry.

Proper nesting supports allcylinders bycontactat three points

?

3 4 withdrawing cylinder content
3.4 Withdrawing Cylinder Content
  • Handling
  • Identification
  • Removing cap
  • Properly supported
  • Pressure regulating devices
  • Connections
3 4 withdrawing cylinder content32
3.4 Withdrawing Cylinder Content

3.4.2 If cylinder content is not identified by marking, return cylinder to the supplier without using.

I’m not labeled!!

3 4 withdrawing cylinder content33
3.4 Withdrawing Cylinder Content

3.4.4

Before using a cylinder,

be sure it is properly supported

to prevent it from being knocked over.

3 4 withdrawing cylinder content34
3.4 Withdrawing Cylinder Content

3.4.5 Suitable pressure regulating devices must be used in all cases where gas is admitted to systems having pressure rating limitations lower than the cylinder pressure.

3 4 withdrawing cylinder content35
3.4 Withdrawing Cylinder Content

3.4.6 Never force connections that do not fit.

3 4 withdrawing cylinder content36
3.4 Withdrawing Cylinder Content

3.4.7 Where compressed gas cylinders are connected to a manifold, such a manifold and its related equipment, such as regulators, must be of proper design.

slide37

A – Line valve

B – Release valve

C – Filler plug

D – Header pipe

E - Regulator

F – Flash arrestor chamber

G – Escape pipe

H – Cylinder

connection pipe

J – Check valve

and drain plug

K – Acetylene cylinders

G

A

E

H

D

B

K

K

F

C

J

Stationary acetylene cylinder manifold and other equipment

3 4 withdrawing cylinder content38
3.4 Withdrawing Cylinder Content

3.4.8 Regulators, gages, hoses and other appliances provided for use with a particular gas or group of gases must not be used on cylinders containing gases having different chemical properties unless information obtained from the supplier indicates that this can be done safely.

Acetylene regulator and oxygen cylinders

3 4 withdrawing cylinder content39
3.4 Withdrawing Cylinder Content
  • 3.4.9
  • Open cylinder valve slowly. Point the valve opening away from yourself and other persons.
  • Never use wrenches or tools except those provided or approved by the gas manufacturer.
  • Avoid the use of a wrench on valves equipped with handwheels.
  • Never hammer the valve wheel in attempting to open or close the valve.
  • For valves that are hard to open, or frozen because of corrosion, contact the supplier for instructions.
3 4 withdrawing cylinder content40
3.4 Withdrawing Cylinder Content
  • 3.4.11 Never use compressed gases where the cylinder is apt to be contaminated by the feedback of process materials unless protected by suitable traps or check valves.
  • 3.4.13 Before a regulator is removed from a cylinder, close the cylinder valve and release all pressure from the regulator.
slide41

Oxygen

Fuel

Gas

3.5 Flammable Gases

Indoor cylinder storage

  • Well protected
  • Well ventilated
  • Dry
  • Twenty feet from flammable or combustible materials

20 Feet

3 5 flammable gases
3.5 Flammable Gases

3.5.1 Do not store cylinders near highly flammable solvents, combustible waste material and similar substances, or near unprotected electrical connections, gas flames or other sources of ignition.

3 5 flammable gases43
3.5 Flammable Gases

3.5.2

Never use a flame to detect flammable gas leaks.

Use soapy water.

3 5 flammable gases44

Oxygen

Fuel

Gas

Fuel

Gas

3.5 Flammable Gases

3.5.3

Do not store reserve stocks of cylinders containing flammable gases with cylinders containing oxygen.

3 6 poison gases
3.6 Poison Gases

3.6.1

Personnel handling and using poison gases should have available for immediate use gas masks or self-contained breathing apparatus of a design approved by U.S. Bureau of Mines for the particular service desired.