Stainless Steel Series
Shurjoint offers a full range of stainless steel grooved mechanical couplings in CF8 (304) and CF8M (316) for general service applications and in specialty alloys for applications including reverse osmosis and desalination systems. Grooved fittings are available in sizes from 1” (25 mm) to 24” (600 mm) produced in a combination of investment castings and wrought stainless.
Pressure ratings of stainless steel couplings
The design pressure rating of Shurjoint stainless steel grooved couplings follows Class 150 and is based on roll grooved Sch. 10S pipe. Pressure ratings will vary depending on the type of pipe used and grooves processed. See Shurjoint Performance Data Sheet #B-37 for pressure ratings (CWP) when used with other pipe schedules and cut-grooved pipe.
Shurjoint ductile iron couplings can be used in conjunction with stainless steel pipe, depending on the application, as the flow media does not come in direct contact with coupling housings but rather only the gasket. See Shurjoint Data Sheet #B-33 for performance data.
Stainless steel pipe in general is more difficult to groove than carbon steel pipe, as it is more difficult to achieve defined groove corners on stainless pipe. Grooves that are not defined and have too much of a radius could result in joint failure. Care must be taken to process grooves as defined as possible. For this reason, roll-groove machine manufacturers offer a variety of roll sets depending on the pipe material and wall thickness being grooved. Always select the correct roll set for the pipe being grooved.
If the same roll-set that has been used for carbon steel pipe is used on stainless steel pipe, rust or scale may be transferred to the stainless steel pipe during processing of the groove. Thus we recommend the use of a separate roll set specifically for use with stainless steel pipe. Also use caution to keep roll grooved stainless steel pipe dry prior to installation.
Stainless Steel Casting Specifications
* 254SMO is a registered trademark of AvestaPolarit AB, 45D is a registered trademark of ESCO Corporation and SAF 2507 is a registered trademark of AB Sandvik Steel.