Choosing the correct Perma-Crimp fitting may be simply identifying the fitting to be replaced by measuring the fitting or in some other way, identifying its size and thread type. Care should be taken in using the correct fitting.

1) The correct fitting is chosen to match a replacement fitting and/or chosen on the basis of formal design and sound engineering practice.

2) Any questions or concerns involving fitting selection should be addressed with the Goodyear EP Hydraulic Applications Group.

3) A helpful guide is the "S.T.A.M.P.E.D." process, which requires the documentation of the following.

S Size--I.D., O.D. and length of the assembly
T Temperature--Temperature of material conveyed and climatic conditions
A Application--Conditions of use including abrasion, flexing and routing
M Material--Type, concentration and composition
P Pressure--Includes surge or impulse pressure
E Ends--Style, type, orientation and attachment methods
D Delivery--Includes testing, quality and packaging requirements
In completing the "S.T.A.M.P.E.D" process, "ENDS" need to be further defined.
Thread Size Drop Length
Thread Type Hose Type
Male or Female Hose Dash Size
Angle of Elbow Hose Working Pressure

4) The Perma-Crimp fitting is available in four styles including Ultra-Crimp, Uni-Crimp, Field-Grip or Dual-Grip. Each fitting consists of a stem and a ferrule. The stem fits into the hose I.D. The ferrule attaches the fitting to the hose cover. The stem has two functional ends. The first is the hose end, which is used to attach the fitting to the hose. The hose end must be compatible with the I.D. of the hose. The other end is the thread end, which is used to attach the assembly to another port in the hydraulic system. The thread end will be determined from the fitting being replaced or by measuring the port or threads being attached. See Fitting Identification in Section VIII of this catalog for additional information on thread styles.

5) Temperature range is important in both hose and fitting selection. Hose temperature ranges are shown in the hose product Section III of this catalog. In general, fittings will be comparable with hose temperature ranges with the exception of o-ring fittings, which are limited to 212 degrees.

6) Flange identification requires additional information. Code 61 Flanges, Code 62 Flanges and Caterpillar Flanges are commonly used to connect large sizes of hose and tubing. Code 61 Flanges are commonly used in applications of 3000-5000 psi working pressure, while Code 62 Flanges can be used in applications up to 6000 psi working pressure. Code 62 and Caterpillar Flanges are similar in application but Caterpillar Flanges have a thicker flange head and are frequently found on Caterpillar equipment. Flanges are identified by measuring the port hole diameter, the longest bolt hole spacing and the flange head thickness.

7) It is possible to have a fitting rated at a lower working pressure than the hose. Keep working pressure in mind when selecting a fitting. The hose assembly can be rated no greater than the lowest pressure rating of either hose or fitting. Reference working pressure tables for both hose and fittings .