Interpretation Response #PI-83-0106
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
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PI-83-0106
No. 83-8
Date: August 1, 1983
DEPARTMENT OF TRANSPORTATION
RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION
MATERIALS TRANSPORTATION BUREAU
________________________________________________________________________
PIPELINE SAFETY REGULATORY INTERPRETATION
Note: This pipeline safety regulatory interpretation applies to all operators that are subject to the rule under Federal or State law.
SECTION: 192.179
SUBJECT: Valve spacing
FACTS: None.
QUESTION: How far apart may sectionalizing block valves be placed on an onshore transmission line being constructed in a Class 1 area?
INTERPRETATION: Section 192.179(a)(4) provides that "Each point on the pipeline in a Class 1 location must be within 10 miles of a valve." A spacing of not more than 20 miles between valves will result in each point on the pipeline between valves being within 10 miles of a valve. This allowable spacing is supported by the language of the proposed rule (35 FR 5713; April 8, 1970) upon which §192.179 is based, which stated that "Each sectionalizing block valve on a transmission line must be installed at a spacing not to exceed 20 miles within areas conforming to Class 1 Location."
Richard L. Beam
Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau
Regulation Sections
| Section | Subject |
|---|---|
| 192.179 | Transmission line valves |