ACoP | Approved code of practice |
AI | Authorised inspector (ASME) |
AST | Atmospheric storage tank |
AUT | Automated ultrasonic testing |
CDTP | Cold differential test pressure |
CDW | Controlled-deposition welding |
CML | Condition measuring location |
COF | Consequence of failure |
CP | Competent Person/Cathodic protection |
CRA | Corrosion risk assessment |
CTP | Critical thickness profile reading |
CUI | Corrosion under insulation |
DAC | Defect acceptance criteria |
DM | Damage mechanism |
DP | Design pressure |
ECT | Eddy current testing |
EIC | Environmentally induced cracking |
FCA | Anticipated future material loss |
FCAW | Flux-cored arc welding |
FFS | Fitness for service |
FOS | Factor of safety |
FRP | Fibre-reinforced plastic |
GMAW | Gas metal arc welding |
GML | General metal loss |
GTAW | Gas tungsten arc welding |
HAZ | Heat affected zone |
HIC | Hydrogen induced cracking |
HSE | Health and safety executive (UK) |
HTHA | High temperature hydrogen attack |
ID | Inside diameter |
IOW | Integrity operating window |
ITP | Inspection and test plan |
LDC | Limit load of damaged component |
LOWT | Loss of wall thickness |
LT | Long term |
LTA | Locally thinned area |
LUC | Limit load of undamaged component |
MAOP | Maximum allowable operating pressure |
MAWP | Maximum allowable working pressure |
MDMT | Minimum design metal temperature |
MDR | Manufacturers data report |
MFL | Magnetic flux leakage |
MMS | Maintenance management system |
MOC | Management of change |
MRT | Minimum required thickness |
MTR | Material test report |
NACE | National association of corrosion engineers |
NDE | Non-destructive examination |
NII | Non-intrusive inspection |
NPS | Nominal pipe size |
OD | Outside diameter |
PCC | Post construction code |
PI | Pipeline inspector |
PID | Process and instrumentation diagram |
PMI | Positive material identification |
POD | Probability of detection |
POF | Probability of failure |
PQR | Procedure qualification record |
PRD | Pressure relieving device |
PRV | Pressure relief valve |
PSSR | Pressure system safety regulations |
PT/MT | Penetrant testing/magnetic testing |
PTR | Point thickness reading |
PTW | Permit to work |
PWHT | Post weld heat treatment |
QA | Quality assurance |
QC | Quality control |
RBI | Risk-based inspection |
RCM | Reliability centred maintenance |
RL | Remnant life |
RP | Recommended practice |
RPB | Release prevention barrier |
RPS | Release prevention system |
RSF | Remaining strength factor |
RT | Radiographic testing |
SAI | Soil-air interface |
SAW | Submerged arc welding |
SBP | Small bore pipework |
SCC | Stress corrosion cracking |
SI | System International (of units) |
SI | Source inspector |
SMAW | Shielded metal arc welding |
SMYS | Specified minimum yield strength |
SOHIC | Stress oriented hydrogen induced cracking |
SPV | Simple pressure vessel |
TML | Thickness measurement location |
TOFD | Time of flight diffraction |
TSS | Total suspended solids |
USCS | United States customary system (of units) |
UT | Ultrasonic testing |
UTS | Ultimate tensile strength |
VT | Visual testing |
WPQ | Welder performance qualification |
WPS | Weld procedure specification |
WSE | Written scheme of examination |