Nebraska Administrative Code
Topic - LABOR, DEPARTMENT OF
Title 229 - DEPARTMENT OF LABOR
Chapter 20 - POWER BOILERS - NEW INSTALLATIONS
Section 229-20-010
Current through March 20, 2024
Each power boiler shall have a feed supply that is in compliance with the requirements of ASME Section I and which will permit the boiler to be fed at any time while under pressure as follows:
A. A boiler having more than five hundred square feet of water-heating surface shall have at least two (2) means of feeding. Each source of feed water shall be capable of supplying water to the boiler at a pressure of three (3) percent higher than the highest setting of any safety valve on the boiler.
B. Boilers fired by gaseous, liquid, or solid fuel in suspension may be equipped with a single means of feeding water provided means are furnished for the immediate shutoff of heat input prior to the water level going below the lowest permissible level. The feed-water shall be introduced into the boiler in such a manner that it will not be discharged close to joints of furnace sheets, directly against surfaces exposed to products of combustion, or directed to surfaces subject to radiation from the fire.
C. The feed piping to the boiler shall be provided with a check valve near the boiler and a stop valve between the check valve and the boiler.
D. When two (2) or more boilers are fed from a common source, there shall also be a valve on the branch to each boiler between the check valve and source of supply. Whenever a globe valve is used on feed piping, the inlet shall be under the disk of the valve.
