North Dakota Administrative Code
Title 33.1 - Department of Environmental Quality
Article 33.1-14 - NORTH DAKOTA BOILER RULES
Chapter 33.1-14-09 - HEATING, LOW PRESSURE, AND HOT WATER SUPPLY BOILERS -EXISTING INSTALLATIONS
Section 33.1-14-09-20 - Bottom blowoff and drain valves

Universal Citation: ND Admin Code ยง 33.1-14-09-20

Current through Supplement No. 394, October, 2024

1. Each steam boiler having a capacity over twenty-five gallons [94.6 liters] must have a bottom blowoff connection fitted with a valve or cock connected to the lowest water space practicable with a minimum size as shown below:

Minimum Required Safety Valve Capacity in Pounds of Steam/Hour

Steam Boiler Blowoff Piping Valve Size, Inches (Min.)

Up to 500

3/4

501 to 1,250

1

1,251 to 2,500

1 1/4

2,501 to 6,000

1 1/2

6,001 and larger

2

2. Each hot water boiler and each steam boiler having a capacity not exceeding twenty-five gallons [94.6 liters] must have a drain valve connected to the lowest water space practicable. The minimum size of this drain valve is three-quarter inch [1.9 centimeters].

General Authority: NDCC 23.1-16

Law Implemented: NDCC 23.1-16

Disclaimer: These regulations may not be the most recent version. North Dakota may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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