Threaded Fittings

Prochem manufactures a wide range of NPT and BSP threaded stainless steel fittings, which are stocked in all branches. All threaded fittings are manufactured from traceable material. Prochem prides itself on the quality of threads produced in the manufacturing operation, with all threads manufactured to recognised international standards.

Prochem has been a forerunner in implementing tighter thread tolerances for the oil and gas industry specifically in the NPT threaded fitting ranges. Prochem NPT threads are manufactured to tolerances exceeding those required by the ANSI B1.20.1 specification, which governs the manufacture of NPT threads. All Prochem threads are gauged using calibrated thread gauges and on every batch of product that is produced the thread profiles are inspected using state of the art equipment. Prochem manufactured threads are among the best in the world.

As Prochem is intimately familiar with the manufacture of threaded fittings, all applications can be assessed for our customers, and fitting solutions and specially manufactured products can be produced.

All threaded fittings are manufactured as standard in Dual Grades 316/316L, 304/304L (Wrought), CF8M (Cast) and F316/316L and F304/304L (Forged), and are also available in other materials where specified by the customers.

Socket Weld Fittings

Prochem manufactures and maintains stock of a wide range of socket weld fittings in Grades 316, 316L, 304, 304L and P11.  Socket weld fittings are also available in other materials where required by our customer.

Buttweld Fittings

Prochem maintains stock of a wide range of buttweld fittings in grades 304/304L, 316/316L, 321/321H and Duplex S31803 stainless steel. This includes elbows, tees, concentric and eccentric reducers and caps. All buttweld fittings are of welded construction with a stock of seamless fittings available.

Material Range Available

• Stainless Steel (Grades 304/304L, 316/316L, 321, 310, 317L, 347),
  Duplex (UNS S31803), Super Duplex (UNS S32760 & UNS S32750), 904L (UNS N08904), 6Mo+ (UNS S31254).
• Monel® (UNS N04400), Hastelloy® (UNS N10276 & UNS N10665), Incoloy® (UNS N08800, UNS N08810 & UNS N08825),
  Inconel® (UNS N06600 & UNS N06625).
• Titanium Grade 2, Grade 7.

A pipe fitting is defined as a part used in a piping system, to change direction or function, which is mechanically joined to the system.

Probably the simplest way to achieve this would be to bend the pipe in the direction required, but this process will stretch and thin the outer wall whilst thickening and wrinkling the inner wall. This results in flow resistance and accelerated wall erosion.
A second method sometimes used is a mitre joint, where pipes are cut to the correct angle and welded together to achieve the desired change. Whilst the cross-sectional area and wall thickness are maintained, a great deal of efficiency is lost due to friction and turbulence resulting from the severe changes in direction. For example, a single-mitre bend offers about six times the resistance of a swept elbow. For these reasons swept fittings are preferred on most piping systems, particularly where internal pressure, flow and corrosion are of major consideration.