N.Y. Comp. Codes R. & Regs. Tit. 16 § 255.619 - Maximum allowable operating pressure: steel or plastic pipelines
(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 psig (689
kPa) or more, the test pressure is divided by a factor determined in accordance
with the following table:
Factors |
||||
Class Location | Installed before (Nov. 12, 1970) | Installed after (Nov. 11, 1970) | Converted under § 255.14 | |
1 ....... | 1.1 ....... | 1.1 | ....... | 1.25 |
2 ....... | 1.25 ....... | 1.25 | ....... | 1.25 |
3 ....... | 1.4 ....... | 1.5 | ....... | 1.5 |
4 ....... | 1.4 ....... | 1.5 | ....... | 1.5 |
(3) the
highest actual operating pressure to which the segment was subjected during the
five years preceding July 1, 1970, unless the segment was tested in accordance
with section
255.505 or
255.507 of this Part during the
five-year period or the segment was upgraded in accordance with section
255.555 or
255.557 of this Part. The MAOP
must not exceed the MAOP on August 30, 2011 if the MAOP is determined using
this method.
(4) for furnace butt
welded steel pipe, a pressure equal to 60 percent of the mill test pressure to
which the pipe was subjected;
(5)
for steel pipe other than furnace butt welded pipe, a pressure equal to 85
percent of the highest test pressure to which the pipe has been subjected,
whether by mill test or by post installation test; or
(6) the pressure determined by the operator
to be the maximum safe pressure after considering the history of the segment,
particularly known corrosion and the 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.
Notes
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