N.H. Admin. Code § Lab 1403.68 - Welding in Confined Spaces

The employer shall ensure compliance with the following requirements:

(a) In addition to the requirements in Lab 1403.14, all welding and cutting operations carried on in confined spaces shall be ventilated to prevent the accumulation of toxic substances or possible oxygen deficiency;

(b) In such operations where it is impossible to provide such ventilation, air supplied respirators or hose masks, which are labeled to indicate they are approved by Mine Safety and Health Administration MSHA for this purpose, shall be used;

(c) In areas immediately hazardous to life, hose masks with blowers or self-contained breathing equipment shall be used. The breathing equipment shall be labeled to indicate it is approved by MSHA;

(d) Where welding operations are carried on in confined spaces and where welders and helpers are provided with hose masks, hose masks with blowers or self-contained breathing equipment, a worker shall be stationed on the outside of such confined spaces to ensure the safety of those working within; and

(e) Oxygen shall never be used for ventilation.

Notes

N.H. Admin. Code § Lab 1403.68

Derived From and Renumbered from Lab 1403.64 Volume XXXV Number 18, Filed May 7, 2015 , Proposed by #10809, Effective 4/9/2015, Expires4/9/2015.