Fittings are a general term for connecting parts used in pipelines for changing direction, reducing/increasing diameter, branching, and making connections.

Elbows, tees, reducers, nipples, couplings, unions, caps (plugs), flange adapters, and clamp connections are the most common types.

Threaded fittings are preferred for small diameters and practical assembly. For higher pressure/temperature applications and industrial lines, welded fittings are safer and more durable.

Threaded fittings are generally measured in inches (""). The correct size should be selected according to your pipe size and connection standard (such as BSP/NPT).

BSP is more of a European/Turkish standard, while NPT, with its tapered thread structure, is generally a US standard. They are not perfectly compatible; the standard should be considered when making a selection. More Information

316 stainless steel is more resistant to corrosion than 304, especially in environments with high corrosion levels such as saltwater/chemical environments. 304 is frequently preferred for general use.

It is common in plumbing, water lines, and some heating applications. Suitability should be assessed according to the chemistry and temperature of the environment.

Black fittings are generally steel connection parts used in natural gas, steam, and industrial lines. Galvanized or stainless steel alternatives can be selected depending on the application.

Galvanized fittings have a coated surface and are more resistant to corrosion. Black fittings are uncoated steel and are selected according to the appropriate application.

Pipe reduction is used to decrease or increase pipe diameter. The correct size is selected according to the flow rate and connection requirements of the line.

Elbows change the direction of the line. A sharp 90° turn or a smoother 45° turn is possible; the choice depends on pressure drop and placement.

Diameter/size compatibility, thread standard (BSP/NPT), material (brass/stainless steel/steel), pressure-temperature conditions, and connection type (threaded/welded) should all be considered together.

Strength varies depending on the material, production standard, and product type. The product should be selected according to the pressure/temperature requirements of the application.

Astel Mechanical Installations sells a variety of stainless steel, black, galvanized, and brass fittings. We provide sales and delivery to all provinces of Türkiye, primarily based in Bursa/Nilüfer. Please contact us for information on suitable sizes, thread standards (BSP/NPT), and stock availability.