Pipe and piping fittings
Coupling
Building the transport path and changing piping geometry
Specialist selection guide
What should be reviewed before selecting this product?
A threaded coupling joins two same-size components in a straight run. Thread engagement, end standard, base material and coating quality govern sealing and durability.
Technical selection path
- 1
Check size and standard of both threads
- 2
Specify material and working pressure
- 3
Review effective thread engagement
- 4
Define compatible sealing method
- 5
Evaluate galvanic corrosion and disassembly
Key strengths
- Simple economical straight connection
- Component replacement capability
- Broad material and coating range
Selection limitations
- Disassembly may require rotating the pipe
- Thread quality directly affects leakage
- Limited for critical services
Typical applications
Where can this option be considered?
- Water and air line repair
- Threaded equipment assembly
- General utility piping
Reference standards
A standard does not replace the project specification
Common technical questions
Concise answers before enquiry
How does a coupling differ from a union?
A union separates without rotating the two pipes, while coupling removal commonly requires rotation of one connected component.
How many threads must engage?
No universal count should be assumed; thread dimensions, tolerance, standard and assembly procedure define acceptance.
Process, transmission and utility piping
Dimensions, wall, material, joining, corrosion and stress
Initial review sheet
Technical attributes to review
Final values must come from project specifications, calculations and manufacturer data. This table defines the information scope.
FamilyThreaded and galvanized fittings
Main groupPipe and piping fittings
Materials to evaluateMalleable iron, Galvanized steel, Stainless steel, Brass
Connections to evaluateTaper thread, Parallel thread
Typical mediaWater, Air, Gas, Fire protection
Relevant industriesOil and gas, Refining, Petrochemical, Power generation, Water and utilities
Reference standardsASME B1.20.1 · EN 10242
Enquiry checklist
Include this information with your request
Thread standard
Size
Material and coating
Working pressure
Thread sealing method
Before substitution
A matching name does not guarantee interchangeability
Installation dimensions, pressure rating, wetted materials, sealing design, construction standard, testing and documentation must be checked independently.
Adjacent types
Other options in this family
Final technical approval is required
This page is educational and intended for initial screening. Final selection must be approved against project requirements, actual service conditions and manufacturer documentation.
Send request for review