been allowed,
each possible procedure combination must be
qualified prior
to combining them into one procedure to account
for the various
essential variables. CGT Welding Specification
No. SMAW-09 does
not have a welding test record for Group B
materials welded
entirely with API 1104 Group 1 electrodes. The
procedure is
incorrect and requires revision to reflect this
omission.
C. The welding
procedure GMAW-208 states the procedure is for a
branch wall
thickness greater than .156" and nominal pipe size of
less that 2
3/8". The weld test record for this procedure
(GMA-
07) states the
testing was performed on .156" w.t. pipe. The
procedure has
not been qualified correctly.
Under 49 United
States Code § 60122, you are subject to a civil penalty
not to exceed
$25,000 for each violation for each day the violation
persists up to a
maximum of $500,000 for any related series of violat-
ions. We have
reviewed the circumstances and supporting documents
involved in the
above probable violations cited in Number 1 and have
decided not to
assess you a civil penalty. We advise you, however,
that should you
not correct the circumstances leading to the violations
we will take
enforcement action when and if the continued violations
come to our
attention.
Additionally,
pursuant to 49 United States Code § 60118, the
Office of
Pipeline Safety proposes to issue to you a Compliance Order
with respect to
violation Number 1. That proposed compliance order is
attached to and
made a part of this Notice of Probable Violation.
In addition to
this, the inspection revealed several areas of concern
that we would
like to bring to your attention. They are as follows:
1.
Several CGT
welding procedures fail to demonstrate that
welds of
suitable
mechanical properties and soundness could be made. CGT
procedures SMAW-01, SMAW-03, SMAW-09, SMAW-11, SMAW-15,
SMAW-R01,
SMAW-R02, and
SMAW-03 give welders the choice of electrodes to
weld a particular tensile strength of steel. An E60
series
welding
electrode used on an X-56 grade pipe, as allowed by your
procedures, can produce a weld with mechanical properties that are
not as strong as
the pipe.
2.
The review of
welding procedures indicated that several
procedures
did not have
data recorded necessary to conclude the welding
procedure was
followed in the welding tests. The weld
test
records were
missing pertinent data such as: voltage, amperage,
and travel
speed.
3.
CGT has
developed new repair methods that allow partial and thru-
wall repairs.
GMAW-R01 and SMAW-R01 are Partial/Thru-wall repair
and Partial wall
repair procedures, respectively. While these
are
understood to be
part of a risk management project, personnel
should not
utilize these procedures until the risk
management demo
has been
accepted and approved as a repair method .
4.
The use of the
SMAW-R02 procedure to repair corrosion pitting on
any grade of
steel greater than Grade B would be in violation of
the pipeline
safety regulations since it permits repair by a
method other
than specified in § 192.713.