Rubber Sealed Key Lock Joint

Rubber Sealed Key Lock Joint

Definition(s)


Rubber Sealed Key Lock Joint

Joint connection made up of a spigot end and a socket end with “O” or lip-sealing rings and some axial restraining device capable of resisting the full thrust from internal pressure. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Rubber Seal Lock Joint

Rubber Seal Lock Joint

Definition(s)


Rubber Seal Lock Joint

Joint connection made up of a spigot end and a socket end with “O” or lip-sealing rings and some axial restraining device capable of resisting the full thrust from internal pressure. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Restrained-end Testing

Restrained-end Testing

Definition(s)


Restrained-end Testing

Pressure-testing arrangement using a pipe-sealing device or mechanism such that internal pressure produces hoop and radial stresses only in the component wall. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Roving

Roving

Definition(s)


Roving

Number of strands, tows or ends collected into a parallel bundle with little or no twist. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
RTR Plastic

RTR Plastic

Definition(s)


RTR Plastic

Polymeric resin-based composite that is reinforced with glass fibre. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Reinforced Thermosetting Resin Plastic

Reinforced Thermosetting Resin Plastic

Definition(s)


Reinforced Thermosetting Resin Plastic

Polymeric resin-based composite that is reinforced with glass fibre. Note: 1 to entry: The predominant glass fibre is E-glass (3.2.22). Note: 2 to entry: ISO 14692 (all parts) is restricted to the use of thermosetting resins (3.2.116).

Note: 3 to entry: GRE, GRUP and GRVE are types of GRP.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Reinforced Plastic

Reinforced Plastic

Definition(s)


Reinforced Plastic

Polymeric resin-based composite that is reinforced with glass fibre. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Reinforcement

Reinforcement

Definition(s)


Reinforcement

Strong material embedded into a matrix to improve its mechanical properties.
  • Note: 1 to entry: Reinforcements are usually long fibres, whiskers, particulates, etc. The term is not to be used synonymously with filler.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Reducer

Reducer

Definition(s)


Reducer

Component that allows pipes of different sizes to be connected. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Rated Temperature

Rated Temperature

Definition(s)


Rated Temperature

Maximum design temperature at the rated pressure (3.2.99) determined in accordance with ISO 14692-2 and ISO 14692-3. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
R-ratio

R-ratio

Definition(s)


R-ratio

ratio of the hoop stress to the axial stress in a particular test condition
  • EXAMPLE: In a hydrostatic test condition where a) the test sample is unrestrained, b) the hoop stress component is represented by half the pressure times diameter divided by wall thickness (PD/2t) and c) the axial stress component is represented by one-fourth the pressure times diameter divided by wall thickness (PD/4t), the R-ratio would be exactly 2,0. In the same test condition, if the axial stress component is represented by force over area (F/A) instead of PD/4t, the R-ratio will most likely be slightly higher than 2,0.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Proportional Limit

Proportional Limit

Definition(s)


Proportional Limit

Greatest stress that a material is capable of sustaining without deviation from linear proportionality of stress and strain.
  • Note: 1 to entry: The proportional limit can be different in the axial direction compared to the hoop direction.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pressure Rating

Pressure Rating

Definition(s)


Pressure Rating

Rating for a component, relating to its long-term resistance to failure when subjected to either static or standardized cyclic internal pressure loading. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Prescribed Threaded Joint

Prescribed Threaded Joint

Definition(s)


Prescribed Threaded Joint

Mechanical joint that complies with API 15 HR. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pot Life

Pot Life

Definition(s)


Pot Life

Length of time that a catalysed thermosetting resin system retains a viscosity low enough to enable processing and sufficient reactivity to achieve specified properties after processing. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Postcure

Postcure

Definition(s)


Postcure

Additional elevated-temperature cure, usually without pressure, to improve final resin properties and/or complete the cure or polymerization of the resin matrix, or decrease the percentage of volatiles in the compound.
  • Note: 1 to entry: In certain resins, complete cure and ultimate mechanical properties are attained only by exposure of the cured resins to temperatures higher than those of curing (typically within to 30 °C to 50 °C of the maximum possible Tg).

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Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Polymerization

Polymerization

Definition(s)


Polymerization

Time/temperature/pressure cycle used to cure a thermosetting resin system from a liquid to a solid. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Poisson’s Ratio, νha

Poisson’s Ratio, νha

Definition(s)


Poisson’s Ratio, νha

Axial strain resulting from a stress in the hoop direction.
  • Note: 1 to entry: GRP pipes will typically contract in the axial direction when subjected to a hoop stress.
  • Note:  2 to entry: For GRP pipes wound at a 54° winding angle, the Poisson's ratio will typically be smaller in magnitude than the minor Poisson's ratio (3.2.79).
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Piping Component

Piping Component

Definition(s)


Piping Component

Mechanical element suitable for joining or assembly into a pressure-tight fluid-containing piping system.
  • EXAMPLE: Pipe, fittings, flanges, gaskets, bolting, valves, and devices such as expansion joints, flexible joints, pressure hoses, liquid traps, strainers and in-line separators.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Piping

Piping

Definition(s)


Piping

Assemblies of piping components used to convey, distribute, mix, separate, discharge, meter, control or restrict fluid flows. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pipe Support

Pipe Support

Definition(s)


Pipe Support

Pipe fixture or structural attachment which transfers the load from the pipe or structural attachment to the supporting structure or equipment.
  • Note: 1 to entry: Fixtures include hanging-type fixtures such as hanger rods, spring hangers, sway braces, counterweights, turnbuckles, struts, chains, guides and anchors; and bearing-type fixtures such as saddles, bases, rollers, brackets and sliding supports.
  • Note: 2 to entry: Structural attachments include elements which are bonded or moulded into the pipe, such as clips, lugs, saddles, rings, clamps, clevises, straps and skirts.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pipe Bonder

Pipe Bonder

Definition(s)


Pipe Bonder

Tradesman able to perform satisfactory and independent work in the installation and joining of composite piping. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Phenolic

Phenolic

Definition(s)


Phenolic

Class of polymer resins made from phenol and formaldehyde, and cured by air drying or heat baking.
  • Note: 1 to entry: Chemical resistance can be further increased via heat and catalyst treatment.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Pdes

Pdes

Definition(s)


Pdes

Purchaser nominated maximum pressure to which a piping system is designed to operate at the nominated design temperature (Tdes) and for the nominated design life (Ldes).
  • Note: 1 to entry: Pdes is typically considered as a sustained pressure, though an additional Pdes occasional can also be nominated. Pdeswill be selected based on the maximum operating pressure plus a purchaser selected uplift a) to accommodate pressure uncertainty, b) to avoid triggering of pressure safety devices, c) to match the rating of attached piping or equipment and d) to provide a design margin for other purposes.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Part Factor

Part Factor

Definition(s)


Part Factor , f3,est

Derating factor that de-rates a component, taking account of non-pressure-related axial loads, e.g. bending and externally-applied direct-acting axial forces so that the combined hoop and axial stresses are still within the design envelope for each individual load case.
  • Note: 1 to entry: f3,est is estimated at the bid stage. The f3,est part factor cannot be confirmed until a stress analysis is conducted. The f3,est part factor can vary from one load case to another.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards

Part Factor , f2

Derating factor related to confidence in the pipework system, the nature of the application and the consequences of failure. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
OP

OP

Definition(s)


OP

Operating Pressure. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards  

OP

Normal or anticipated standard internal pressure difference, i.e. internal minus external pressure, to be experienced by the pipe or piping system which should not exceed the design pressure. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Nominal Diameter

Nominal Diameter

Definition(s)


Nominal Diameter

Numerical designation of size that is common to all components in a piping system, other than components designated by outside diameters or by thread size.
  • Note: 1 to entry: It is a convenient round number for reference purposes and is only loosely related to manufacturing dimensions.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Modulated differential scanning calorimetry

Modulated differential scanning calorimetry

Definition(s)


Modulated differential scanning calorimetry

Type of DSC (3.2.19) that enables reversible reactions to be distinguished from irreversible processes such as additional polymerization of the resin during the test. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
MDSC

MDSC

Definition(s)


MDSC

Type of DSC (3.2.19) that enables reversible reactions to be distinguished from irreversible processes such as additional polymerization of the resin during the test. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Minor Poisson’s Ratio, Vah

Minor Poisson’s Ratio, Vah

Definition(s)


Minor Poisson’s Ratio, Vah

Hoop strain resulting from a stress in the axial direction.
  • Note: 1 to entry: GRP pipes will typically contract in the hoop direction when subjected to an axial stress.
Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards