# COMAR Title 09 — Maryland Department of Labor

## Subtitle 12 — Division of Labor and Industry

### Chapter 01 — Board of Boiler Rules

#### Regulation .18 Lap-Seam Crack.

*COMAR 09.12.01.18*

A. If a boiler or pressure vessel has a lap-seam crack along a longitudinal riveted joint, use of the shell or drum shall be discontinued immediately.

B. If the boiler is not more than 15 years old, a complete new course of the original thickness may be installed upon:

  (1) Recommendation by the inspector; and

  (2) Approval of the chief boiler inspector.

C. Patching a lap seam crack is prohibited.