Traditional threaded fittings for galvanized steel pipe require time-consuming assembly with thread sealants and tools to tighten connections. Non-threaded fittings offer a faster and easier alternative by eliminating threaded joints.
Here Are The Main Types Of Non threaded Galvanized Pipe Fittings
Grooved Fittings
Grooved fittings have grooves cut into one or both ends that accept a mechanical coupling device. When compressed, the coupling forms a seal around the groove to join the pipes.
Advantages of grooved fittings include:
- Fast installation – No need for threading or pipe sealant.
- Secure seal – The mechanical coupling forms a positive seal that does not leak.
- Flexibility – Allow for angular deflection and axial movement between pipes.
- Disassembly – Joints can be disconnected and reassembled repeatedly.
- Standardization – Connectors follow industry-standard dimensions for compatibility.
Grooved fittings are commonly used for applications like sprinkler systems and compressed air lines where rapid installation is important. Different coupling styles are available based on operating pressure and piping material.
Flared Fittings
Flared fittings have tubular ends that are flared out at an angle using a flaring tool. These ends fit inside a cylindrical mating fitting to form a mechanical joint.
Advantages of flared fittings include:
- Fast assembly – No taping or tightening of threads required.
- Secure seal – The angled end forms a tight seal inside the mating fitting.
- Choice of materials – Available in brass, copper, steel and plastic options.
- Disassembly – Joints can be separated by simply pulling the fittings apart.
- Code approved – Meet requirements of plumbing codes for water line installations.
Flared fittings are commonly used for connecting pipes in refrigeration, HVAC and plumbing applications where galvanized steel pipe is paired with copper tubes. They are also used to transition between pipes of different materials.
Push-Fit Fittings
Push-fit fittings feature barbs or grooves on the ends that expand when inserted into mating fittings using hand pressure. They form a tight compression seal when fully inserted.
Push-fit fittings are best suited for use with flexible pipe materials like PEX and polypropylene. They can be prone to failure with rigid pipes if not properly installed.
The Main Differences Between Non-threaded And Threaded Pipe Fittings
- Speed of installation – Non threaded galvanized pipe fittings can be assembled much faster since there is no threading or tightening of joints. Threaded fittings require more time and effort.
- Ease of assembly – Non-threaded fittings are easier to assemble by hand with no tools required in most cases. Threaded fittings require pipe threading and wrenches.
- Permanence of joint – Threaded fittings form a more permanent joint that is difficult to disassemble. Non-threaded fittings can be disconnected and reconnected repeatedly.
- Security of seal – Threaded fittings typically form a more secure seal that is leak-proof. Some non-threaded fittings can be prone to leaks.
- Flexibility – Many non-threaded fittings allow for some angular deflection and axial movement between pipes. Threaded fittings are more rigid.
- Pressure handling – Threaded fittings can typically handle higher pressures due to their secure seal. Some non-threaded fittings are limited to lower pressures.