# COMAR Title 09 — Maryland Department of Labor

## Subtitle 12 — Division of Labor and Industry

### Chapter 01 — Board of Boiler Rules

#### Regulation .29 Safety Appliance Removal.

*COMAR 09.12.01.29*

A. When a boiler or pressure vessel is operating, a person may not remove, modify, alter, or repair a safety appliance required by these regulations.

B. When a boiler or pressure vessel is not operating and a safety appliance is removed for modification, alteration, or repair the appliance shall be reinstalled in proper working order before the boiler or pressure vessel resumes operation.

C. A safety valve may not be loaded to maintain a working pressure greater than the maximum allowable operating pressure.