Combustion Air

Combustion Air

Definition(s)

Combustion Air

Air provided to burn the combustible gases.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards

Combustion Air

Air required to combust the flare gases. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Cold Differential Test Pressure (CDTP)

Cold Differential Test Pressure (CDTP)

Definition(s)

Cold Differential Test Pressure (CDTP)

Pressure at which a pressure-relief valve is adjusted to open on the test stand. NOTE The cold differential test pressure includes corrections for the service conditions of back pressure or temperature or both. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards   

Cold Differential Test Pressure

Inlet static pressure at which a pressure-relief valve is adjusted to open on the test stand.

NOTE: The CDTP includes corrections for the service conditions of backpressure or temperature or both.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Closed Disposal System

Closed Disposal System

Definition(s)

Closed Disposal System

Disposal system capable of containing pressures that are different from atmospheric pressure. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Burst Pressure

Burst Pressure

Definition(s)

Burst Pressure

Value of the upstream static pressure minus the value of the downstream static pressure just before a rupture disk bursts.
  • NOTE: If the downstream pressure is atmospheric, the burst pressure is the upstream static gauge pressure.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Burn-Pit Flare

Burn-Pit Flare

Definition(s)

Burn-Pit Flare

Open excavation, normally equipped with a horizontal flare burner that can handle liquid as well as vapour hydrocarbons. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Test Area

Test Area

Definition(s)

Test Area

Area on OCTG that has been ground or filed smooth and flat to remove the decarburized surface material, on which a hardness test is performed. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Test

Test

Definition(s)

Test

Two or more valid hardness test readings that have been made in the same test area. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Test

specific operation of lifting equipment, with or without a defined load, in order to determine whether the lifting equipment is suitable for use Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global Standards
Tally

Tally

Definition(s)

Tally (Verb)

Add up lengths of OCTG to arrive at an aggregate. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Burning Velocity or Flame Velocity

Burning Velocity or Flame Velocity

Definition(s)

Burning Velocity or Flame Velocity

Speed at which a flame front travels into an unburned combustible mixture. Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Straightness

Straightness

Definition(s)

Straightness

Degree to which the longitudinal axis of a length of OCTG is parallel to a straight line. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Standardization Check

Standardization Check

Definition(s)

Standardization Check

Check of the standardization adjustments to ensure that they remain correct. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Standardization

Standardization

Definition(s)

Standardization

The adjustment of an NDT instrument using an appropriate reference standard, to obtain or establish a known and reproducible response. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Standardization

Adjustment of instruments prior to use to an arbitrary reference value. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  

Standardization

Activity for the establishment of rules and characteristics for the purposes of their voluntary and repeated utilisation aimed to ensure orderliness in the spheres of manufacture and circulation of products and to raise the level of competitiveness of products, works or services. Source: Federal Law on Technical Regulation, No. 184-FZ, Russian Federation, December 2002 (amended September 2010). Regulations
Burnback

Burnback

Definition(s)

Burnback

Internal burning within the flare tip. NOTE Burnback can result from air backing down the flare burner at purge or low flaring rates. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Fifth Edition, January 2007 (Addendum May 2008). Global Standards 
Source

Source

Definition(s)

Source

Origin of radiation, which is an x-ray tube or radioisotope. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Source

Flow into a system Source: IADC UBO / MPD Glossary, December 2011. Global Standards  

Source

Reason for the presence of a cause or defeating factor, or for the presence of the hazard itself. Sources can be operations (e.g., running casing), necessary equipment (e.g., pressure vessel, energized electrical panel, etc.), necessary materials (e.g. hazardous chemicals), etc. Other Related Terms and Definitions: ISO Guide 73 – Item or activity having a potential for a consequence (in the context of safety, source is a hazard). Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines
Signal-to-Noise Ratio

Signal-to-Noise Ratio

Definition(s)

Signal-to-Noise Ratio

Ratio of the signal from a significant imperfection or defect to signals generated from surface noise. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Signal

Signal

Definition(s)

Signal

Response of electronic NDT equipment to an imperfection or defect. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Signal

Audible indication giving information about the condition of a system or equipment. Source: IMO resolution A.1021(26), Code on Alarms and Indicators, 2009, 18 January 2010, International Maritime Organization. Regulatory Guidance
Sensitivity

Sensitivity

Definition(s)

Sensitivity

Size of the smallest discontinuity detectable by an NDT method with a reasonable signal to-noise ratio. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Seamless Pipe

Seamless Pipe

Definition(s)

Seamless Pipe

Tubular product fabricated without a welded seam. NOTE Typically manufactured in a hot forming process by extrusion or drawing which can be followed by cold sizing or finishing to the desired shape, dimensions and properties. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards

Seamless Pipe

Wrought steel tubular product made without a welded seam. NOTE Seamless pipe is manufactured by hot-working steel and, if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Seamless Pipe

Wrought steel tubular product made without a weld seam. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  

Seamless Pipe

Tubular product made without a welded seam, manufactured in a hot-forming process using an extrusion or drawing process that can be followed by cold sizing or cold finishing to produce the desired shape, dimensions and properties. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

Seamless Pipe

Wrought steel tubular product made without a weld seam. NOTE It is manufactured by hot-working steel, and if necessary, by subsequently cold-working or heat-treating, or a combination of these operations, to produce the desired shape, dimensions and properties. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global Standards  

Seamless Pipe

Wrought steel tubular product made without a weld seam. NOTE It is manufactured by hot working and, if necessary, by subsequently cold-working or heat-treating, or a combination of these operations, to produce the desired shape, dimensions and properties. [ISO 11960:2004, definition 4.1.37]. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global Standards
Scanner

Scanner

Definition(s)

Scanner

Detector assembly carrying one or more transducers, used for detecting imperfections and defects in OCTG. NOTE The scanner is often equipped with a magnetizer and is a part of it. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Root

Root

Definition(s)

Root

Bottom of a thread. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Relevant Indication

Relevant Indication

Definition(s)

Relevant Indication

Any indication [liquid penetrant (LP) or magnetic particle (MP) examination] with a major dimension greater than 1.6 mm (0.062 in.).
  • NOTE: Inherent indications not associated with a surface rupture are considered nonrelevant indications.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards

Relevant Indication

Surface NDE indication (iquid penetrant or magnetic particle examination) with a major dimension greater than 1.6 mm (0.062 in)
  • NOTE: Inherent indications not associated with a surface rupture are considered non-relevant indications.
Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards

Relevant Indication

NDT indication that is caused by a condition or type of discontinuity that requires evaluation. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Relevant Indication

Surface-rupture NDE indication with major dimensions greater than 1,6 mm (1/16 in). NOTE Inherent indications not associated with a surface rupture are considered non-relevant. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards  

Relevant Indication

Only those indications with major dimensions greater than 1⁄16 inch shall be considered relevant. Inherent indications not associated with a surface rupture (for example, magnetic permeability variations and non-metallic stringers) are considered non-relevant. If magnetic particle indications are believed to be non-relevant, they shall be examined by liquid penetrant surface NDE methods or removed and reinspected to prove their non-relevancy. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards
Reference Standard

Reference Standard

Definition(s)

Reference Standard

Pipe, or pipe section, containing one or more reference indicators, used as a basis for comparison or for inspection equipment standardization. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Reference Indicator

Reference Indicator

Definition(s)

Reference Indicator

Real or artificial discontinuity in a reference standard, which provides reproducible sensitivity levels for inspection equipment. EXAMPLES Artificial reference indicators can be holes, notches, grooves or slots. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards
Pulser

Pulser

Definition(s)

Pulser

Electronic device and probe for generating a controlled-magnitude magnetic pulse, used for standardizing transducers. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Pulse

Pulse

Definition(s)

Pulse

Wave of short duration. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Prime Pipe

Prime Pipe

Definition(s)

Prime Pipe

Pipe meeting all of the specified inspection and testing requirements. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Power-Tight

Power-Tight

Definition(s)

Power-Tight

Threaded connection that has been fully made up by mechanical means, using power tongs or a screw-on machine. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Powder-Dry

Powder-Dry

Definition(s)

Powder-Dry

Sufficiently dry to allow any type of powder, when applied to the surface, to be blown from the surface without residue remaining. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Planar Imperfection

Planar Imperfection

Definition(s)

Planar Imperfection

Imperfection lying in one geometric plane that is normally parallel to, and within, the outer and inner surfaces. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Plain End

Plain End

Definition(s)

Plain-End Pipe

Pipe without threads or tool-joint. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Plain End

Drill pipe, tubing, or casing without threads. The pipe ends may or may not be upset. Source: API RP 7G, Recommended Practice for Drill Stem Design and Operating Limits, Upstream Segment, Sixteenth Edition, August 1998 (Addendum 2: September 2009). Global Standards