You are here

Interpretation Response #PI-73-019

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date: 07-11-1973
Company Name: New Hampshire Public Utilities Commission    Individual Name: Bruce B. Ellsworth
Location state: NH    Country: US

View the Interpretation Document

Response text:

Jul 11 1973

Mr. Bruce B. Ellsworth
Gas Safety Engineer
New Hampshire Public Utilities Commission
26 Pleasant Street
Concord, New Hampshire 03301

Dear Mr. Ellsworth:

In your letter of June 25, 1973, you asked about "...§192.187, Vaults: sealing, venting, and ventilation. (a) When the internal volume exceeds 200 cubic feet - (1) The vault or pit must be ventilated with two ducts, each having at least the ventilating diameter of a pipe 4" in diameter;..."

The intent of this regulation is to assure that there is adequate ventilation so that a hazardous condition will be avoided. Therefore, if the 8-inch vent with a 4-inch vent inside will provide adequate ventilation to avoid this hazardous condition, the requirements of this regulation will be satisfied. If you have any further questions relative to this requirements, please contact me.


Joseph C. Caldwell
Office of Pipeline Safety

Regulation Sections

Section Subject
§ 192.187 Vaults: Sealing, venting, and ventilation