Mill Hydrostatic Test

Mill Hydrostatic Test

Definition(s)

Mill Hydrostatic Test

Short-term hydrotest at the mill, or factory, used as a quality control check which is carried out at a pressure above 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

Megohmmeter

Megohmmeter

Definition(s)

Megohmmeter

High-voltage instrument used for measuring electrical resistance.

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
Mechanical Joint

Mechanical Joint

Definition(s)

Mechanical Joint

Joint between GRP piping components which can resist thrust from internal pressure and is not made by bonding. 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
Matrix

Matrix

Definition(s)

Matrix

Homogeneous resin or polymer material in which the fibre system is imbedded in a laminar arrangement.

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
Maximum Pressure Rating

Maximum Pressure Rating

Definition(s)

Maximum Pressure Rating

Pressure rating given by the manufacturer in product literature.
  • Note: 1 to entry: MPRxx is the maximum pressure rating at sustained conditions for a 20-year design life at the temperature of xx °C. MPRxx is the maximum catalogue value published by the manufacturer.
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
Major Poisson’s Ratio, Vha

Major Poisson’s Ratio, Vha

Definition(s)

Major Poisson’s Ratio, Vha

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
Lower Prediction Limit

Lower Prediction Limit

Definition(s)

Lower Prediction Limit

97,5 % lower bound value for an individual component failure, based on the long-term hydrostatic pressure or stress for a 20-year lifetime Note 1 to entry: The LPL will always be lower than the LCL (3.2.71) for the nominal regression line (i.e. the prediction interval will always be larger than the confidence interval). 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
LPL

LPL

Definition(s)

LPL

Lower Prediction Limit. 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  

LPL

97,5 % lower bound value for an individual component failure, based on the long-term hydrostatic pressure or stress for a 20-year lifetime Note 1 to entry: The LPL will always be lower than the LCL (3.2.71) for the nominal regression line (i.e. the prediction interval will always be larger than the confidence interval). 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
Lower Confidence Limit

Lower Confidence Limit

Definition(s)

Lower Confidence Limit

97,5 % lower bound value of the nominal long-term regression line for hydrostatic pressure or stress based on a 20-year lifetime. 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
LCL

LCL

Definition(s)

LCL

Lower confidence limit. 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  

LCL

97,5 % lower bound value of the nominal long-term regression line for hydrostatic pressure or stress based on a 20-year lifetime. 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
Long-term Envelope

Long-term Envelope

Definition(s)

Long-term Envelope

Envelope that defines the stress levels that are just below those that can potentially cause irreversible damage during continuous or occasional loading conditions at a specified temperature. 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
Leak Test

Leak Test

Definition(s)

Leak Test

Pressure test to determine the presence of leaks at joints or within components of a piping system.
  • Note: 1 to entry: Usually carried out at a pressure lower than the hydrotest (3.2.56) and for a longer period.
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
Laying Length

Laying Length

Definition(s)

Laying Length

Actual length of a line, corresponding to the initial length plus the increase afforded by the fitting or integral joint when installed. 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
Laminated Joint

Laminated Joint

Definition(s)

Laminated Joint

Joint consisting of plain-ended pipe and fittings laminated together with reinforcing fibres and resin/hardener mixture. 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
Laminate

Laminate

Definition(s)

Laminate

Unite laminae with a bonding material, usually using pressure and heat.
  • Note: 1 to entry: Normally used with reference to flat sheets, but can also refer to tubes. A product made by such bonding is referred to as a laminate.
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
Laminae

Laminae

Definition(s)

Laminae

Thin sheet of reinforcing fibres in a resin matrix built up into a flat or curved arrangement.

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

Jointer

Jointer

Definition(s)

Jointer

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
Intumescent

Intumescent

Definition(s)

Intumescent

Passive fire-protection coating which, in the presence of fire, expands to create an inert insulating “char” layer. 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
Intrados

Intrados

Definition(s)

Intrados

Interior curve of an elbow or torus. 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
Incendive Discharge

Incendive Discharge

Definition(s)

Incendive Discharge

Electrostatic spark discharge of sufficient energy to ignite a flammable atmosphere. 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
Impregnate

Impregnate

Definition(s)

Impregnate

Saturate the reinforcement with a resin. 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
Hydrotest

Hydrotest

Definition(s)

Hydrotest

Pressure test to verify the pressure-retention integrity of a piping system after installation. 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
Hydrocarbon Pool Fire

Hydrocarbon Pool Fire

Definition(s)

Hydrocarbon Pool Fire

Fire caused by ignition of a pool of hydrocarbon liquid. 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
Heat-distortion temperature

Heat-distortion temperature

Definition(s)

Heat-distortion temperature

Temperature at which a standard test bar deflects a specified amount under a stated load. 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
HDT

HDT

Definition(s)

HDT

Heat-distortion temperature. 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  

HDT

Temperature at which a standard test bar deflects a specified amount under a stated load. 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
Hardener

Hardener

Definition(s)

Hardener

Substance or mixture added to a plastic composition to promote or control the curing action by taking part in it. 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
Hand Lay-up

Hand Lay-up

Definition(s)

Hand Lay-up

Process for fabricating a composite structure in which discontinuous reinforcements, e.g. woven mats, chopped strand mats, are impregnated with a matrix material and are manually applied on a mandrel or mold. 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
Grounding Clamp

Grounding Clamp

Definition(s)

Grounding Clamp

Metal fitting attached to the pipe component to provide an electrical connection to earth. 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
ground, v, US

ground, v, US

Definition(s)

ground, v, US

Provide electrical contact with earth. 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
Gradient

Gradient

Definition(s)

Gradient

Slope of internal pressure over time, on a logarithmic-logarithmic scale, of a static regression curve.
  • Note: 1 to entry: The slope, although negative, is published and used as a positive number.
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