New York Codes, Rules and Regulations
Title 16 - DEPARTMENT OF PUBLIC SERVICE
Chapter III - GAS UTILITIES
Subchapter C - Safety
Part 255 - Transmission And Distribution Of Gas
Operations
Section 255.619 - Maximum allowable operating pressure: steel or plastic pipelines

Universal Citation: 16 NY Comp Codes Rules and Regs § 255.619

Current through Register Vol. 47, No. 12, March 26, 2025

(a) Except as provided in subdivision (c) of this section, no person may operate a segment of steel or plastic pipeline at a pressure that exceeds the lowest of the following:

(1) the design pressure of the weakest element in the segment, determined in accordance with this Part;

(2) the pressure obtained by dividing the pressure to which the segment was tested after construction as follows:
(i) for plastic pipe in all locations, the test pressure is divided by a factor of 1.5;

(ii) for steel pipe operated at 100 p.s.i. (689 kPa) gauge or more, the test pressure is divided by a factor determined in accordance with the following table:

Class Location

Factors1 for segment -

Installed before Nov. 11, 1970

Installed on or after Nov. 12, 1970

Converted under § 255.14

1

1.1

1.5

1.5

2

1.25

1.5

1.5

3

1.5

1.5

1.5

4

1.5

1.5

1.5

1 For off shore pipeline segments installed, uprated or converted after July 31, 1977, that are not located on an offshore platform, the factor is 1.25. For pipeline segments installed, uprated or converted after July 31, 1977, that are located on an offshore platform or on a platform in inland navigable waters, including a pipe riser, the factor is 1.5.

(4) the pressure determined by the operator to be the maximum safe pressure after considering and accounting for records of material properties, including material properties verified in accordance with Section 255.607 of this Part, if applicable, and the history of the pipeline segment, including known corrosion and actual operating pressure.

(b) No person may operate a segment to which paragraph (a)(6) of this section is applicable, unless overpressure protective devices are installed on the segment in a manner that will prevent the maximum allowable operating pressure from being exceeded, in accordance with section 255.195 of this Part.

(c) Notwithstanding the other requirements of this section, an operator may operate a segment of pipeline found to be in satisfactory condition, considering its operating and maintenance history, at the highest actual operating pressure to which the segment was subjected during the five years preceding July 1, 1970, subject to the requirements of section 255.611 of this Part.

(d) Notwithstanding the limitation of paragraph (a)(3) of this section, an operator may maintain a previously established maximum allowable operating pressure for a cathodically protected steel or plastic pipeline provided that, when the pressure is increased above the highest pressure to which it has been subjected during the last five years, it is leakage surveyed and all leaks found are repaired in accordance with this Part.

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