Page 423 - Cat4800-Oct2011

409 Parker Industrial Hose Customer Service
866 810 HOSE (4673) 800 242 HOSE (4673)
Strongsville, OH South Gate, CA
Eastern USA Western USA
www.safehose.com
e-mail: indhose@parker.com
Safety & T
echnical Information
Coupling Thread Compatibility
Industrial hose couplings have threads which are usually one of the various “pipe” threads. All pipe threads are com-
monly referred to by the generic name of Iron Pipe Thread or IPT. There are several different types of IPT threads
and you must know specifically what they are to ensure compatibility with mating threads.
IPT Thread Compatibility Chart
Description Seal Thread
(Female)
Compatible
Threads
(Male)
American Standard Tapered Pipe Thread Thread Seal (with Sealing
Compound)
NPT NPT
NPTF
American Standard Tapered Dryseal Pipe Thread Thread Seal (Dryseal)* NPTF NPTF
NPT
American Standard Straight Pipe Thread for mechanical joints
(includes 2 female types, depending on sealing method, and
one male type compatible with both females)
Washer or Mechanical
Ground Joint
NPSM NPSM
NPT
NPTF
American Standard Straight Pipe Threads for hose couplings
and nipples
Washer NPSH NPSH
NPT
NPTF
*When NPTF Threads are used more than once, they require sealing compound after the frst use.
In addition, there are various other thread types that may be found on industrial hose couplings. These types are
generally not compatible with any other thread types:
Type Description Seal
GHT Garden Hose Thread Washer seal
API American Petroleum Institute Thread Thread seal
JIC (37˚) Joint Industry Council Mechanical seal
SAE (45˚) Society of Automotive Engineers Mechanical seal
NF Welding Hose Threads-Left Hand and Right Hand Mechanical seal
CHT Chemical Hose Thread (for booster hoses) Gasket seal