piping classes

Name Display Label

PIPING_COMPONENT Piping Component

FLUID_REGULATOR Fluid Regulator

VALVE Valve

OPERATED_VALVE Operated Valve

ACTUATED_VALVE Actuated Valve

SELF_OPERATING_VALVE Self Operating Valve

SELF_ACTING_CONTROL_VALVE Self Acting Control Valve

FLOAT_VALVE Float Valve

AIR_RELEASE_VALVE Air Release Valve

ANGLE_VALVE Angle Valve

ANGLE_BALL_VALVE Angle Ball Valve

ANGLE_CHECK_VALVE Angle Check Valve

CONTROL_VALVE Control Valve

ANGLE_CONTROL_VALVE Angle Control Valve

ANGLE_GLOBE_VALVE Angle Globe Valve

ANGLE_MEMBRANE_VALVE Angle Membrane Valve

ANGLE_PLUG_VALVE Angle Plug Valve

STRAINER StrainerANGLE_STRAINER Angle StrainerAREA_CLASS Area

RELIEF_VALVE Relief Valve

PRESSURE_RELIEF_VALVE Pressure Relief Valve

BALANCED_RELIEF_VALVE Balanced Relief Valve

ONE_WAY_FLOW_REGULATOR One Way Flow Regulator

CHECK_VALVE Check Valve

LIFT_CHECK_VALVE Lift Check Valve

BALL_CHECK_VALVE Ball Check ValveINLINE_VALVE Inline Valve

BALL_VALVE Ball Valve

BASKET_STRAINER Basket Strainer

PIPE_FLANGE Pipe Flange

BLIND_FLANGE Blind Flange

PIPE_CLAMP Pipe Clamp

BOLTED_PIPE_CLAMP Bolted Pipe Clamp

BREATHER Breather

BUTTERFLY_CONTROL_VALVE Butterfly Control Valve

BUTTERFLY_VALVE Butterfly Valve

PIPE Pipe

COILED_TUBING Coiled Tubing

COMPENSATOR Compensator

PIPE_REDUCER Pipe Reducer

CONCENTRIC_PIPE_REDUCER Concentric Pipe ReducerSWAGE SwageCONCENTRIC_SWAGE Concentric Swage

SWAGED_PIPE_NIPPLE Swaged Pipe Nipple

CONCENTRIC_SWAGED_PIPE_NIPPLE Concentric Swaged Pipe Nipple

FULL_BORE_VALVE Full Bore Valve

CONDUIT_VALVE Conduit Valve

CONDUIT_GATE_VALVE Conduit Gate Valve

CONVENTIONAL_RELIEF_VALVE Conventional Relief Valve

CONVENTIONAL_SAFETY_RELIEF_VALVE Conventional Safety Relief Valve

DELUGE_VALVE Deluge Valve

MEMBRANE_VALVE Membrane Valve

DIAPHRAGM_VALVE Diaphragm Valve

DRAIN_VALVE Drain Valve

DRILLING_AREA Drilling Area

PIPE_ELBOW Pipe ElbowDRIP_PAN_ELBOW Drip Pan Elbow

DUPLEX_STRAINER Duplex Strainer

ECCENTRIC_PIPE_REDUCER Eccentric Pipe Reducer

ECCENTRIC_SWAGED_PIPE_NIPPLE Eccentric Swaged Pipe Nipple

OLET Olet

ELBOLET Elbolet

PIPE_BRANCH Pipe Branch

PIPE_CROSS Pipe Cross

EQUAL_PIPE_CROSS Equal Pipe Cross

PIPE_TEE Pipe Tee

EQUAL_PIPE_TEE Equal Pipe Tee

THREADED_PIPE_TEE Threaded Pipe Tee

Pipe Tee Threaded Externally And Internally

EXPANDER_FLANGE Expander Flange

Female Branch Tee Sae J514 Ob 070427 Cb

FLAME_ARRESTOR Flame Arrestor

SWING_CHECK_VALVE Swing Check Valve

PIPE_TEE_THREADED_EXTERNALLY_AND_INTERNALLY

EQUAL_PIPE_TEE_EXTERNALLY_AND_INTERNALLY_THREADED

Equal Pipe Tee Externally And Internally Threaded

FEMALE_BRANCH_TEE_SAE_J514__OB_070427_CB_

FLAP_VALVE Flap Valve

FOOT_VALVE Foot Valve

FOUR_WAY_CONTROL_VALVE Four Way Control Valve

MULTI_WAY_VALVE Multi Way Valve

FOUR_WAY_VALVE Four Way Valve

FUNNEL Funnel

GASKET Gasket

GATE_CONTROL_VALVE Gate Control Valve

GATE_VALVE Gate Valve

GLOBE_CONTROL_VALVE Globe Control Valve

GLOBE_VALVE Globe Valve

PIPE_COUPLING Pipe Coupling

HALF_PIPE_COUPLING Half Pipe Coupling

VALVE_OPERATING_DEVICE Valve Operating Device

MANUAL_VALVE_OPERATING_DEVICE Manual Valve Operating Device

HAND_WHEEL Hand Wheel

HAZARDOUS_AREA Hazardous Area

HIGH_PRESSURE_RELIEF_VALVE High Pressure Relief Valve

HOSE Hose

HOSE_COUPLING Hose Coupling

INJECTION_AREA Injection AreaINLINE_PIPE_COMPONENT Inline Pipe Component

INSERT_PIPE_REDUCER Insert Pipe Reducer

INSTRUMENT_VALVE Instrument Valve

KNIFE_GATE_VALVE Knife Gate Valve

LAP_JOINT_FLANGE Lap Joint Flange

LATROLET Latrolet

PIPE_ELBOW_LONG_RADIUS Pipe Elbow Long Radius

LONG_RADIUS_45_DEGREE_PIPE_ELBOW Long Radius 45 Degree Pipe Elbow



MEMBRANE_CONTROL_VALVE Membrane Control Valve

MITERED_PIPE_BEND Mitered Piping Bend

MOTOR_OPERATED_CONTROL_VALVE Motor Operated Control Valve

MUD_VALVE Mud Valve

NEEDLE_VALVE Needle Valve

NIPOLET Nipolet

SEAL_RING Seal Ring

O_HY_RING O-RING

ORIFICE_FLANGE Orifice Flange

ORIFICE_PLATE Orifice Plate

PIGGABLE_VALVE Piggable Valve

PILOT_OPERATED_RELIEF_VALVE Pilot Operated Relief Valve

PINCH_VALVE Pinch Valve

PIPE_BEND Pipe Bend

PIPE_BUSHING Pipe Bushing

PIPE_CAP Pipe Cap

REDUCING_PIPE_CROSS Reducing Pipe Cross

Pipe Cross Reducing On Both Branches

PIPE_ELBOW_30_DEGREE Pipe Elbow 30 Degree

PIPE_CROSS_REDUCING_ON_BOTH_BRANCHES

PIPE_CROSS_REDUCING_ONE_RUN_AND_BOTH_BRANCHES

Pipe Cross Reducing One Run And Both Branches

PIPE_ELBOW_30_DEGREE_LONG_RADIUS Pipe Elbow 30 Degree Long RadiusPIPE_ELBOW_3R Pipe Elbow 3r

PIPE_ELBOW_45_DEGREE Pipe Elbow 45 DegreePIPE_ELBOW_45_DEGREE_3R Pipe Elbow 45 Degree 3r

PIPE_ELBOW_45_DEGREE_SHORT_RADIUS Pipe Elbow 45 Degree Short RadiusPIPE_ELBOW_45_DEGREE_TRIMMED Pipe Elbow 45 Degree Trimmed

PIPE_ELBOW_60_DEGREE Pipe Elbow 60 Degree

PIPE_ELBOW_60_DEGREE_SHORT_RADIUS Pipe Elbow 60 Degree Short Radius

PIPE_ELBOW_90_DEGREE Pipe Elbow 90 DegreePIPE_ELBOW_90_DEGREE_3R Pipe Elbow 90 Degree 3r

PIPE_ELBOW_90_DEGREE_SHORT_RADIUS Pipe Elbow 90 Degree Short Radius

PIPE_ELBOW_DOUBLE_BRANCH Pipe Elbow Double Branch

PIPE_ELBOW_REDUCING Pipe Elbow Reducing

PIPE_ELBOW_SHORT_RADIUS Pipe Elbow Short Radius

PIPE_ELBOW_SHORT_RADIUS_30_DEGREE Piping Elbow Short Radius 30 Degree

PIPE_ELBOW_SIDE_OUTLET Pipe Elbow Side Outlet

PIPE_ELBOW_THREADED Pipe Elbow ThreadedPIPE_ELBOW_TRIMMED Pipe Elbow Trimmed

PIPE_ELBOW_UNION Pipe Elbow Union

PIPE_END Pipe End

PIPE_FLANGE_GASKET Pipe Flange GasketPIPE_HOSE Pipe Hose

PIPE_HUB Pipe HubPIPE_INLINE Pipe InlinePIPE_JOINT Pipe Joint

PIPE_LATERAL_TEE Pipe Lateral Tee

PIPE_NIPPLE Pipe Nipple

PIPE_PLUG Pipe PlugPIPE_REINFORCED_BRANCH Pipe Reinforced Branch

PIPE_RETURN Pipe ReturnPIPE_S_BEND Pipe S BendPIPE_STUB Pipe Stub

REDUCING_PIPE_TEE Reducing Pipe Tee

PIPE_TEE_REDUCING_BRANCH Pipe Tee Reducing Branch

Pipe Tee Reducing One Run And Branch

PIPE_UNION Pipe UnionPIPE_UNREINFORCED_BRANCH Pipe Unreinforced Branch

PIPE_TEE_REDUCING_ONE_RUN_AND_BRANCH

PIPING_NETWORK_SEGMENT Piping Network Segment

PIPING_NETWORK_SYSTEM Piping Network System

PLANT_AREA Plant Area

PLUG_CONTROL_VALVE Plug Control Valve

ROTARY_VALVE Rotary Valve

PLUG_VALVE Plug ValvePOINT_OF_USE_BEND Point Of Use BendPOINT_OF_USE_STRAIGHT Point Of Use Straight

PRESSURE_HY_VACUUM_RELIEF_VALVE Pressure-Vacuum Relief Valve

Self Actuated Pressure Control Valve

PRESSURE_MAINTAINING_VALVE Pressure Maintaining Valve

SELF_ACTUATED_PRESSURE_CONTROL_VALVE

PRESSURE_REDUCING_VALVE Pressure Reducing Valve

REDUCING_FLANGE Reducing Flange

REDUCING_PIPE_COUPLING Reducing Pipe Coupling

REDUCING_PIPE_LATERAL_TEE Reducing Pipe Lateral Tee

RELIEF_POP_HY_OFF_VALVE Relief Pop-Off Valve

RESTRICTION_ORIFICE_PLATE Restriction Orifice Plate

RETURN_BEND Return Bend

RING_JOINT_GASKET Ring Joint GasketRISING_HANDWHEEL_TOPWORK Rising Handwheel Topwork

SAFETY_RELIEF_VALVE Safety Relief Valve

SEAL Seal

SEGMENT Segment

Self Acting Temperature Control Valve

SIDE_OUTLET_PIPE_TEE Side Outlet Pipe Tee

SILENCER Silencer

SLIP_ON_FLANGE Slip On FlangeSOCKET_WELDED_FLANGE Socket Welded Flange

SOCKOLET SockoletSOLENOID_CONTROL_VALVE Solenoid Control Valve

SPACER Spacer

SPECIAL_PURPOSE_PIPING_BEND Special Purpose Piping Bend

SPECTACLE_BLIND Spectacle Blind

SPECTACLE_BLIND_NORMALLY_CLOSED Spectacle Blind Normally Closed

SPECTACLE_BLIND_NORMALLY_OPEN Spectacle Blind Normally Open

SPOOL_PIECE Spool Piece

SELF_ACTING_TEMPERATURE_CONTROL_VALVE

SPRING_HY_LOADED_CONSTANT_DOWNSTREAM_PRESSURE_VALVE

Spring-Loaded Constant Downstream Pressure Valve

STEAM_TRAP Steam Trap

STOP_CHECK_VALVE Stop Check Valve

Straight Through Pressure Relief Valve

SWEEPOLET Sweepolet

T_STRAINER T Strainer

TAP Tap

THREADED_FASTENER Threaded Fastener

THREADED_FLANGE Threaded Flange

THREADOLET Threadolet

THREE_WAY_VALVE Three Way Valve

THREE_WAY_BALL_VALVE Three Way Ball Valve

THREE_WAY_CONTROL_VALVE Three Way Control Valve

THREE_WAY_GLOBE_VALVE Three Way Globe Valve

THREE_WAY_PLUG_VALVE Three Way Plug ValveTOPWORKS Topworks

TWO_WAY_VALVE Two Way Valve

U_HY_RING U-RING

STRAIGHT_THROUGH_PRESSURE_RELIEF_VALVE

UNION_PIPING_TEE Union Piping Tee

UTILITY_AREA Utility Area

V_BALL_VALVE V Ball Valve

V_HY_RING V-RING

VACUUM_RELIEF_VALVE Vacuum Relief Valve

VACUUM_SAFETY_VALVE Vacuum Safety Valve

VENT_VALVE Vent Valve

VENTURI_TUBE Venturi Tube

WAFER_CHECK_VALVE Wafer Check Valve

WALL_PIPE Wall Pipe

WEIGHT_OPERATED_RELIEF_VALVE Weight Operated Relief Valve

WELD_NECK_FLANGE Weld Neck Flange

WELD_NECK_ORIFICE_FLANGE Weld Neck Orifice Flange

WELDED_JOINT Welded Joint

WELDOLET Weldolet

Y_STRAINER Y Strainer

YARWAY_RELIEF_VALVE Yarway Relief Valve

Description RDS/WIP Unique ID

base class for all piping components. not in rdl.

a physical object that is intended to permit, obstruct, regulate or divert fluid flow.

http://rdl.rdlfacade.org/data#R14218199801

a fluid regulator that can be used to control (i.e. permit, obstruct, regulate or divert) a fluid stream.


a valve that includes an external means of operation. (e.g. handwheel / lever / actuator.)


an operated valve where the operator is an actuator.


a valve that includes a means of operation (e.g. spring / gravity / fluid pressure / counter balance), and is not depending on an external source of energy.


a control valve that is a self operating valve with a built in actuator (without input of signal or energy from external sources).


a self acting control valve that usually is operated by a float mechanism to regulate or maintain a liquid level in a tank.


A float valve that is made for gas or vapour release from a liquid system.


a valve that has valve ports which are not in-line.


a ball valve that deviates from the in-line design, i.e. with a body shape designed to adjust the flow direction with a specified angle relative to the straight through-flow an in-line valve would have provided for.

a check valve that deviates from the in-line design, i.e. with a body shape designed to adjust the flow direction with a specified angle relative to the straight through-flow an in-line valve would have provided for.


A class which classifies areas.

a valve that can be used to modify (regulate) the fluid flow rate in a process control system. it usually includes an actuator, which responds to a signal from the controlling system and changes the position of the flow controlling element in the valve.


a control valve that is an angle valve with a corresponding actuator intended to manipulate a stream of fluid in response to a difference between a signal from an external sensing element and a setpoint and with input of energy from an external source.


a globe valve that deviates from the in-line design, i.e. with a body shape designed to adjust the flow direction with a specified angle relative to the straight through-flow an in-line valve would have provided for.


a membrane valve that deviates from the in-line design, i.e. with a body shape designed to adjust the flow direction with a specified angle relative to the straight through-flow an in-line valve would have provided for.

a plug valve that deviates from the in-line design, i.e. with a body shape designed to adjust the flow direction with a specified angle relative to the straight through-flow an in-line valve would have provided for.

a mechanical separator which is separating solid particles from a fluid by passing the fluid through a wire mesh, screen or metal plates containing perforations or slits.


a self operating valve that is set to open at a certain pressure level to prevent the pressure in a container or system from reaching unsafe levels.


a pipe clamp which is connected by bolts.

a relief valve that is an automatic pressure relieving device actuated by the static pressure upstream of the valve.


A pressure relief valve that incorporates means of minimizing the effect of back pressure on the operational characteristics of the valve (opening pressure, closing pressure and relieving capacity).


a fluid regulator that permits fluid to flow in one direction only.


a valve that permits fluid to flow in one direction only.


a check valve that is a check valve in which the closure member is lifted from the seat during forward flow. e.g. ball, piston, nozzle check, and foot valves.


a lift check valve that is having a free spring loaded ball closing on a spherical seat.


a rotary valve that has a ball closure member.


a strainer where the screen has the shape of a basket.


an artefact where one of the ends, namely the flanged end, has the shape of a circular plate with holes to make a bolted connection.


a piping flange without a central opening intended for the shut off of a flanged end.


an artefact consisting of two halves shaped to be placed over a piping hub end and connected. intended to connect pipes and/or piping components.



A physical object providing communication between atmosphere, and the inside of another device in order to maintain atmospheric pressure with an item


a concentric swaged piping nipple.

a butterfly valve that is equipped with an actuator that manipulates a stream of fluid in the response to a signal from an external sensing element and with input of energy from an external source.


a rotary valve that has a closure member of a disc type with a shaft parallel, or near parallel, to the plane of the disc, with an axis of rotation transverse to the flow direction.


an artefact which is a long tube or hollow body intended for conducting liquid, gaseous or finely divided solid material or for structural purposes.


A pipe that is manufactured in continuous lengths and stored on a reel


A device compensating for axial or radial movement between two elements that is connected


an artefact with different nominal pipe size at the two ends, intended to connect pipes or piping components.


a piping reducer where the center lines of the two ends are in line.


a piping reducer which is a nipple of specific short length, and of relatively small nominal size.



a valve that is a valve where the opening of the closure member is big enough to allow a sphere equal to the valve's nominal size to pass through the closure member. (bore approximately equivalent to the pipe bore.)


a conduit valve of the gate valve type.

a valve with a circular hole in the closure member that will pass a sphere no smaller than specified for the applicable nominal size (less the tolerance), except that the end preparation of weld-end valves may require a smaller bore at the weld end to properly mate with the pipe.



A pressure relief valve that has its closing force provided by a spring.


A pressure relief valve that is equipped with vented bonnet where its performance characteristics are directly affected by changes of the back pressure.


a control valve that is intended to operate at high temperature, and admit water into a deluge system. it is fail safe, kept closed by pressurised gas, and is typically made of bronze.


a valve that is a valve where the closure member is a flexible membrane.


a membrane valve that is a membrane valve where the closure member is a resilient diaphragm being forced against a port.


a valve that can be used to drain empty a piping system, storage tank, or similar. the drain valve is typically installed at the lowest point of the system to allow draining by gravity.


A plant area where systems related to drilling wells are located.

an artefact which is a discrete component intended to make a change in the direction of a pipe run between 0 and 135 degrees.



a piping reducer where the centerlines of the two ends have an offset.


an eccentic swaged piping nipple.

base class for all piping branches. not in rdl.


an artefact which is self reinforced and intended to be welded onto a hole in the wall of a pipe or a piping component and the other end to be connected to another pipe or piping component.


an olet making a reducing tangent branch on a piping elbow.


an artefact with 4 ends/branches mutually at right angles in one plane


a piping cross where all four ends have the same nominal size.

an artefact with 3 piping ends in t-shape, including a branch at 90 degrees


a piping tee where all 3 ends have the same nominal pipe size.


a piping tee where all ends are threaded ends.


a pipe tee with externally and internally threaded ends.


an equal piping tee threaded with externally and internally threaded ends.


a piping flange where the nominal bore size of the non-flanged end is larger than the nominal bore size of the flanged end.


an externally/internally threaded straight pipe tee conforming to the specification for female branch tee (070427) provided by sae j514, hydraulic tube fittings.

An Arrestor which is a trap overt an opening, e.g. of a ventilation system or a pipe, tomprevent flames from entering the system


a check valve that is a check valve where the closure member is a disc which swings freely on a hinge and which opens automatically when flow is established and closes automatically when flow ceases or is reversed.


a swing check valve that is equipped with a hinged disc or flap, sometimes leather or rubber faced, intended for low pressure applications.


a check valve that is intended to provide an open inlet for total immersion on a pump suction line. often fitted with a filter or strainer.


A control valve that has four different pahts through which the flow can pass

a valve that has multiple paths of flow through itself.


a multi way valve that is made with four separate paths of flow.


A hollow cone with a tube extending from the smaller end and that is to catch and direct a downward flow


a seal which is one or more closed loops of deformable material used between mating surfaces which have only very limited movement relative to each other. the material is deformable in order to effect the seal between surfaces which have irregularities or


A control valve that is a gate valve with corresponding actuator intended to manipulate a stream of fluid in the response to a difference between a signal from an external sensing element and a set point and with input of energy from an external source.


a valve that is a valve where the closure member is a gate or disc with a linear motion parallel, or nearly parallel, to the plane of flat seats, which are transverse to the direction of flow.


a control valve that is a globe valve with corresponding actuator intended to manipulate a stream of fluid in the response to a difference between a signal from an external sensing element and a setpoint and with input of energy from an external source.


a valve that is a valve where the closure member is a disc or piston operating with linear motion normal to the flat or shaped seat.


an artefact which is a one-piece cylindrical section intended to join pipes and/or piping components.


a piping coupling where only one of the ends have been shaped to allow linear connection. the other end has a drilled hole.


A physical object that is an external means of operating a valve.

A valve operating device that is intended to be driven by human power.

A physical object that typically consists of a rim connected to a hub by spokes, which is used to manually operate another physical object, requiring the wheel to be turned.

A place in which an explosive gas atmosphere is or may be expected to be present in quantities such as to require special precautions for the construction, installation and use of electrical apparatus.

A relief valve that is venting off high pressure gas to the atmosphere. (High pressure in this context is typically p>30 bar.)


A tubular which is flexible and capable of conveying liquids under pressure


an artefact which consists of a hose nipple and a hose coupling swivel.


A plant area which is dedicated to the treatment, compression, pumping, condition and transfer of substances injected into the topside process itself, or into the reservoir.

a piping reducer with one plain end, one larger socket welding end.


a valve that is intended to enable or prevent a fluid condition to be in direct conact with a fluid stream .


control valve with electric motor actuator

a gate valve that has a narrow parallel gate with a shaped edge indented to cut through glutenous media or slurries when closing.


a piping flange intended to be used with stub ends. it differs from a lapped flange by not having a recess in the faced end so that the stub end protrude past the face of the flange.


an olet making a reducing branch connection at an angle less than 90 (typically 45) degrees on a straight pipe.


a piping elbow where the centerline radius is 1.5 times the nominal size, except for small sizes (nps<1") which have larger radii. for reducing elbows the radius is 1.5 times the nominal pipe size of the large end.


A control valve that is a membrane valve with corresponding actuator intended to manipulate a stream of fluid in the response to a difference between a signal from an external sensing element and a set point and with input of energy from an external source.


an artefact intended to change piping direction with a non-standard radius, fabricated from mitred pipe segments.

a valve that is assigned to handle muddy substances.


a globe valve that has a closure member with the shape of a conical plug (needle) which closes into a small seat. typically used for flow metering or damping of pressure fluctuations on instruments, e.g. pressure gauge.


A seal ring that has a circular cross section.

an olet making a 90-degree branch and which has an integral pipe nipple.


a seal which is a ring made of rubber, elastomer or other special material.



a pipe flange that is provided with taps for instrument connection.


a plate with a specified hole which creates a pressure drop in a fluid flowing through a closed conduit.


a full bore valve suitable for the passage of pigs and spheres.


A pressure relief valve that uses a pilot valve to indirectly activate the main valve.


a membrane valve that is comprising a flexible tube, either exposed or enclosed in a body. the tube is pinched to close by mechanical means.


an artefact intended to change piping direction with a non-standard radius, normally fabricated from pipe by bending.


an artefact with one external threaded end and one smaller internal threaded end intended to accommodate different bore diameters.


an artefact which is intended to provide closure at a piping end by fitting on or over the end, as opposed to inside.


a piping cross where the nominal sizes of the ends are not the same.


a reducing piping cross where the nominal sizes of two opposite branches are different and smaller than the other opposite pair, which have the same nominal size.


a reducing piping cross where the nominal size of one of the branches is larger than the other 3 branches, which have the same nominal size.



a piping elbow with threaded ends.

a piping elbow with union ends.




a piping elbow with the three outlets in a plane, two in oposite directions and the third at 90 degrees.


a piping elbow with different nominal size at the two ends.


a piping elbow where the centerline radius is 1.0 times the nominal size, except for small sizes (nps<1") which have larger radius.


a piping elbow with three outlets located along three perpendicular axes where the centerpoint of the elbow is at the origin of the axes.




an end with a surface shaped to provide connection, sealing, and communication of pressure or flow between artefacts installed in, or connected to, piping systems.


not in rdl.

a circular gasket with a centric hole which is compressed into joint surface irregularities in pipe flanges shaped to fit different gasket contact faces.


an artefact which is of cylindrical shape with a buttwelding end in one end and a hub end in the other end.


an artefact with three piping ends where the branch is angled to the run, typically at 45 degrees.


a short piece of pipe with standardised length.


an artefact intended for plugging a piping end.


an artefact making a nominal 180 degree change in the direction of the pipe run.


a piping tee where the nominal diameters of the ends are not all the same.


a reducing piping tee where the branch has a smaller nominal size than both the header (run) ends, which have the same nominal size.


a reducing piping tee where one of the header (run) ends and the branch has a smaller nominal size than that of the other header (run).


an artefact which is an assembly of three items comprising of two threaded ends and a center piece that draws the two ends together when rotated. this avoids the need to turn the connected pipe components


The piping limited by a Node and a Break, Node and Connector, two Nodes, two Breaks, two Connectors or a Break and a Connector. The last five providing there are no Breaks or Connectors in between. In the last three cases the Segment will coincide with a Piping Branch.


A fluid system of interconnected piping network branches limited by Unit Operation Inlet/Outlet and Piping Network Terminators.


An area which is a subdivision of a plant by functional areas.

A control valve that is a plug valve with corresponding actuator intended to manipulate a stream of fluid in the response to a difference between a signal from an external sensing element and a set point and with input of energy from an external source.


a valve that is a valve where the closure member has a rotating action. the axis of rotation is usually normal to the flow.


a rotary valve that has a quarter turn action in which the closure member is a cylindrical or tapered plug which operates by rotating on its axis and sealing against a downstream seat.


A pressure relief valve that is intended to release excess pressure or admit pressure to prevent a vacuum forming when filling or emptying a pipeline or tank.


a self acting control valve that is maintaining a predefined upstream or downstream fluid flow operated by the process pressure.


A self actuated pressure control valve that maintains the upstream line pressure within specified limits.


a self actuated pressure control valve that is equipped with an internal pressure sensing element that reduces the upstream line pressure to a set level downstream, and maintains the reduced pressure irrespective of changes in upstream pressure.


a piping flange where the nominal bore size of the non-flanged end is smaller than the nominal bore size of the flanged end.


a piping coupling intended to connect pipes and/or piping components of different od size designation with the same or different threads.


a piping lateral tee where the branch has a smaller nominal pipe size than the header.


A relief valve that is designed to be used in breathing circuits. The relief pop-off valve is venting gas to the atmosphere when the pressure of the gas in the breathing circuit reaches a certain level.


an orifice plate intended for use as a restrictor


a piping bend which has a nominal 180 degrees change of direction.


a ring gasket having a specially shape to form a groove located between two flanges.


A relief valve that automatically relieves a pressure system where the pressure exceeds a set limit and which closes when pressure falls below the set limit. It is by design a full lift pressure relief valve intended for gas or steam safety service.


a device intended to reduce or prevent the passage of fluid between artefacts, which may or may not be moving relative to each other. typically used in order to prevent loss, hazard, damage or contamination .


Segment under pipeline

A phylical object intended to reduce noise

control valve with solenoid actuator

spectical blind normally closed


A self acting control valve that is a valve modulating a predefined upstream or downstream fluid flow operated by the process temperature.


a piping tee with an additional branch normal to the plane of the other three ends.



a piping flange where the non-flanged end is a slip on end.

an olet with a socket welding end, making a 90 degree branch.


a device which is intended to provide a certain distance between two parts within an assembly.


a piping bend which is specially manufactured, e.g. with a non standard radius or angle.


an artefact consisting of two disc with equal thickness and outer diameter connected with a flat bar. one of the discs is furnished with a hole thus allowing fluid flow, and the other blocing the flow. the first is installed during normal operation, the latter when blocking is required.




a functional device which is a short section of pipe used to connect ends of pipes/pipelines.


A self actuated pressure control valve that acts against a spring pressure to maintain a constant downstream pressure.


A strainer with a T-shape.

A trap that consists of a chamber into which condensed steam from steam pipes etc. is allowed to drain, and which automatically ejects it withoutpermitting the escape of steam


a lift check valve that is combining the self-acting operation of a check valve with the manual action of a globe valve.


A relief valve that is a relief valve of straight body design, usually with small bore for instrumentation purposes.


an olet which makes a 90-degree reducing branch with a swept profile at the connection to the main run pipe.



a fluid regulator that controls the flow of liquid or gas from a pipe or container. taps are often attached to a sink or bath.



a piping flange where the non-flanged end is a threaded end.


an olet making a 90 degree branch with a threaded connection at the branch end.


a multi way valve that is made with three separate paths of flow.


a ball valve that is a three way valve with three paths of flow through the valve body.


A control valve that has three different pahts through which the flow can pass


a globe valve that is a three way valve with three paths of flow through the valve body.

a plug valve that is a three way valve with three paths of flow through the valve body.


a multi way valve that is made with two separate paths of flow.


A seal ring that has a U-shaped cross section.


a piping tee where all ends are union ends.

A joint that has been done by welding


A plant area which provides space for all system functions necessary for production facilities to be fully operative, though do not form part of actual production.

a ball valve that has a v-shaped port in the ball.


A seal ring that has a V-shaped cross section.


A relief valve that is used for pressure compensation purposes by admitting (letting in) a pressure to prevent that vacuum is forming when filling or emptying a system.


A self acting control valve that automatically releases excess pressure or admits pressure to prevent a vacuum.


a valve that can be used for ventilation purposes.


A pipe or tube that has a constriction with a relative long passage with a smooth coned entry and exit


a wafer pattern valve that is a check valve with a wafer pattern valve body.


pipe with radial fin which sits in the concret wall. - not in the rdl - suugest addition.

A relief valve that is a relief valve in which the closure member is held against the seat by a static weight.


a piping flange where the non-flanged end is a hub or neck with a butt welding end.


an orifice flange where the non-flanged end is a welding end.



an olet with a butt welding end, making a 90 degree branch.



A relief valve that is a valve installed in a bypass line on the discharge header of a pump that is recirculating the minimum flow required back to the pump suction in cases of closed discharge line.


piping classes

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