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Valves and flow control

Manual and mechanical valvesActuated valvesControl valvesSolenoid valvesActuators and control accessories

Pipe and piping fittings

Industrial pipesButt-weld fittingsHigh-pressure forged fittingsThreaded and galvanized fittingsReinforced branch outletsPolymer pipe, valves and fittings

Joining, flanges and sealing

Industrial flangesGaskets and sealing systemsLine blinds and isolation platesStud bolts, bolts and nuts

Steam, strainers and equipment protection

Steam and condensate equipmentPipeline strainers and filters

Instrumentation and measurement

Process measurement instrumentsInstrument fittings and manifolds

Supports and flexible connections

Pipe supports, hangers and clampsExpansion joints and flexible connectors

Steel products and sections

Industrial steel sections and products

Joining, flanges and sealing

Stud bolts, bolts and nuts

Diameter, thread series and pitch, length, bolt and nut grade, coating and lubricant must match the flange class and tightening procedure.

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Type and construction

Available types

Each type has its own technical page
1

Fully threaded stud bolt

View details2

Hex-head bolt

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Heavy hex nut

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Plain washer

View details5

Spring washer

View details6

Coated bolting

View details7

Low-temperature bolting

View details8

High-temperature bolting

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Quick comparison

How the main types differ in selection

Open a type for full details
TypePurposeBest suited toWatchpoint
Fully threaded stud boltJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
Hex-head boltJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
Heavy hex nutJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
Plain washerJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
Spring washerSupporting weight and controlling pipe movementTransferring sustained, thermal and occasional loads to structureLoad, movement, friction, corrosion, insulation and structural design
Coated boltingJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
Low-temperature boltingJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation
High-temperature boltingJoining, sealing or isolating sections of pipingSafe and inspectable assembly of piping and equipmentComponent compatibility, bolt load, contact surfaces and installation

Before selection

Information to define

  1. 1Diameter and length
  2. 2Thread series
  3. 3Bolt grade
  4. 4Nut grade
  5. 5Coating
  6. 6Lubrication and torque

Typical materials

Alloy steelStainless steelLow-temperature steel

Typical connections

Coarse threadFine threadMetric

Typical media

Flange and equipment joining

Function

What does this family do?

Joining and sealing

Creating welded, threaded, flanged or mechanical joints with compatible sealing

Functional selection guide

Pipe support and restraint

Carrying weight, controlling movement and transferring piping loads to structure

Functional selection guide

Technical reference

Related standards

The exact edition and requirements must be checked against the project specification.

ASTM A193ASTM A194ASTM A320ASME B1.1

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Related families

Industrial flanges

Detachable pipe, valve and equipment connections across standards and pressure classes

Gaskets and sealing systems

Flanged-joint sealing matched to facing, pressure, temperature and fluid

Pipe supports, hangers and clamps

Weight support, movement guidance and load transfer from piping to structure

Engineering note

This page supports initial screening and does not replace engineering calculations, project specifications, manufacturer approval or design pressure-temperature checks.

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