TITLE 8
CONSTRUCTION SAFETY ORDERS

CHAPTER 4, SUBCHAPTER 4, ARTICLE 32
SECTION 1740(m)
AND

GENERAL INDUSTRY SAFETY ORDERS

CHAPTER 4, SUBCHAPTER 7, ARTICLES 76 AND 85
SECTIONS 4649 AND 4821

USE OF CYLINDERS ASSOCIATED WITH WELDING AND CUTTING OPERATIONS


Amend Section 1740 to read:

§1740. Storage and Use of Cylinders.

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(k) Use of Fuel Gas.

(1) The employer shall instruct employees in the safe use of fuel gas.

(2) Before a regulator to a cylinder valve is connected, the valve shall be opened slightly and closed immediately. (This action is generally termed "cracking" and is intended to clear the valve of dust or dirt that might otherwise enter the regulator.)

(3) The person cracking the valve shall stand to one side of the outlet, not in front of it. The valve of a fuel gas cylinder shall not be cracked where the gas would reach welding work, sparks, flame, or other possible sources of ignition.

(l) The cylinder valve shall be opened slowly to prevent damage to the regulator. For quick closing, valves on fuel gas cylinders shall not be opened more than 1 1/2 turns. When a special wrench is required, it shall be left in position on the stem of the valve while the cylinder is in use so that the fuel gas flow can be shut off quickly in case of an emergency. In the case of manifold or coupled cylinders, at least one such wrench shall be available for immediate use. Nothing shall be placed on top of a fuel gas cylinder, when is use, which may damage the safety device or interfere with the quick closing of the valve.

(m) When the valve on a fuel gas cylinder is opened and there is found to be a leak around the valve stem, the valve shall be closed and the gland nut tightened. If this action does not stop the leak, the use of the cylinder shall be discontinued, and it shall be properly tagged and removed from the work area. In the event that fuel gas should leak from the cylinder valve, rather than from the valve stem, and the gas cannot be shut off, the cylinder shall be properly tagged and removed from the work area. If a regulator attached to a cylinder valve will effectively stop a leak through the valve seat, the cylinder need not be removed from the work area. taken outdoors, to an isolated area, away from personnel and sources of ignition. The supplier shall promptly be notified of the leaking cylinder valve and the supplier’s instructions shall be followed.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


Amend Section 4649 to read:

§4649. Construction and Marking of Cylinders.

(a) All portable cylinders used for the storage and shipment of compressed gases shall be constructed and maintained in accordance with the regulations of the U.S. Department of Transportation 49 CFR Parts 171 - 179.

(b) Compressed gas cylinders shall be equipped with connections complying with ANSI B57.1-1965. "Compressed Gas Cylinder Valve Outlet and Inlet Connections." that are approved as defined in Section 3206 of the General Industry Safety Orders.

(c) All cylinders with a water weight capacity of over 30 pounds shall be equipped with means of connecting a valve protection device or with a collar or recess to protect the valve.

(d) Compressed gas cylinders shall be legibly marked, for the purpose of identifying the gas content, with either the chemical or the trade name of the gas. Such marking shall be by means of stenciling, stamping, or labeling, and shall not be readily removable. Whenever practical, the marking shall be located on the shoulder of the cylinder.

NOTE: This method conforms to ANSI Z48.1-1954 (R1971), "Method for Marking Portable Compressed Gas Containers to Identify the Materials Contained."

(e) The numbers and markings stamped into cylinders shall not be tampered with.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


 

Amend Section 4821 to read:

§4821. Gas Systems Piping for Welding and Cutting, Materials and Design.

(a) Piping and fittings shall comply with Section 2, Industrial Gas and Air Piping Systems of the American National Standard Code for Pressure Piping ANSI B31.1 1983 insofar as it does not conflict with (b) and (c).

(b) Pipe shall be at least Schedule 40 and fittings shall be at least standard weight in sizes up to and including 6-inch nominal.

(c) Copper tubing shall be Types K or L in accordance with the Standard Specification for Seamless Copper-Alloy Water Tube, ANSI/ASTM B586 1980 ASTM B88-96 which is hereby incorporated by reference.

(d) Piping shall be steel, wrought iron, brass or copper pipe, or seamless copper, brass or stainless steel tubing, except as provided in Sections 4822 and 4823.

(e) Service piping systems shall be protected by pressure relief devices set to function at not more than the design pressure of the systems and discharging upwards to a safe location.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.