California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 4 - Construction Safety Orders
Article 4 - Dusts, Fumes, Mists, Vapors, and Gases
Section 1536 - Ventilation Requirements for Welding, Brazing, and Cutting
Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Mechanical Ventilation for Indoor Operations. Local exhaust systems providing a minimum air velocity of 100 lineal feet per minute in the welding zone shall be used except as otherwise specified by this section.
(b) Toxic Substances Used in Any Enclosed Space.
(A) Beryllium | (E) Lead | |
(B) Cadmium | (F) Mercury | |
(C) Chromium | (G) Zinc | |
(D) Fluorides | (H) Inert-gas metal-arc welding or oxygen cutting of stainless steel |
(c) Toxic Substances Used in the Open Air. Where toxic substances such as those listed in paragraph (b)(1) are used, respiratory protective equipment, in accordance with Section 1531, shall be provided except as otherwise specified by this subsection.
(d) Improper Use of Welding Gases. Compressed gases used for welding and cutting shall not be used for ventilation purposes, comfort cooling, blowing dust from clothing, or cleaning the work area.
(e) Chlorinated Hydrocarbons. Degreasing or other operations involving chlorinated hydrocarbons shall be located or controlled such that vapors from these operations will not enter the atmosphere surrounding any welding or cutting operations to prevent the degradation of such chlorinated hydrocarbon vapors to more highly toxic gases by the action of heat or ultraviolet radiation.
(f) Precautionary Labels. Hazardous materials used in welding and cutting shall bear precautionary labels as required by Section 5150 of the General Industry Safety Orders.
1. New section filed 6-18-75; effective thirtieth day thereafter (Register 75, No. 25).
2. Amendment filed 12-13-84; effective thirtieth day thereafter (Register 84, No. 50).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.