• What chemicals, materials, and environments will the device be exposed to?
  • Is it a dangerous, volatile, abrasive, or corrosive material?
  • Is the coupling material compatible with the media and environment?
  • Does the coupling meet regulatory standards prescribed for this media?
• What pressures and temperatures are involved?
  • Is it specifically a high, medium, or low pressure application?
  • Is it for a suction application?
  • Are the hose and coupling devices compatible, and how does the coupling device affect the assembly's pressure rating?
• What means of connection are required?
  • Threaded connections?
  • Locking devices or other special safety requirements?
  • Flanged?

When selecting couplings the end-user should inform Central States Hose of the application and pressures involved when ordering hose assemblies.

All hose assemblies should be treated with respect as potential hazards. Worn-out fittings, clamps, or clips should be checked for on a regular basis.

The shank length of a coupling should be 1-1/2 times the inside diameter of hose.

Common Coupling Devices

Picture	Name	Service	Size Range	Description	Attachment
	Short Shank	Low pressure air and water service.	3/16" to 1"	Cast brass w/ serrated shank. GHT, NPSM, or NPT male and NPSH female. Washer seal.	Clamps or bands.
	Long Shank	Medium pressure air, water, sanitary, and liquids in suction or discharge service.	1/4" to 3"	Malleable iron, steel, or cast brass construction. NPT male and NPSM female or GHT threads. Washer seal.	Two bands or clamps.
	Barbed Inserts	Low or medium pressure air, water, and fluids.	3/16" to 1"	Machined brass with serrated shank. NPT or NPTF male and solid female, and NPSM swivel female. Thread seal to NPT or NPTF female, and ball end or washer seal to NPSM female.	Bands or clamps.
	Interlocking	High pressure air and water service, steam, high pressure spray, LPG, and anhydrous ammonia service.	1/4" to 6"	Cadmium plated malleable iron. Insert and spud may be either steel or malleable iron. NPT male and female with ground joint or washer seal.	Four bolts or two bolts interlocking clamps.
	Quick Acting	Low to medium pressure air, water, and oil service where frequent and fast connections must be made.	1/4" to 2"	Malleable iron cadmium plated, stainless steel, or bronze.	Interlocking clamps or bands.

Common Coupling Devices (cont.)

Picture	Name	Service	Size Range	Description	Attachment
	Water Suction	Heavy duty water suction and discharge service.	1" to 8"	Malleable iron, aluminum, and/or brass.	Clamps or bands.
	Interlocking Clamp	Heavy duty high pressure applications such as air, steam, water, spray, LPG, and anhydrous ammonia hose.	9/16" to 7-3/16" hose O.D.	Malleable iron, cadmium plated.	Calmps bolted into position.
	Cam and Groove	Low and medium pressure water, petroleum, and chemical transfer where fast connections are needed. Also used for suction service.	1/2" to 6"	Aluminum, bronze, stainless steel, monel, malleable iron. Washer seal with no threads.	Clamps or bands.

Common Coupling Devices (cont.)

Picture	Name	Service	Size Range	Description	Attachment
	Standard Serrated Nipple	Medium to high pressure air, water, and liquid service.	1/4" to 1"	Machined steel and plated. NPT male threads. Thread or washer seal.	Clamps or bands.
	Swaged or Crimped	For use on all types of hose where high pressures are used such as LPG, aircraft fueling, air, etc.	1-1/4" to 4"	Couplings consist of swaged fittings having serrated steel shanks with ferrules of cadmium plated steel.	Swaging equipment.
	Combination Nipple	Low to medium pressure discharge and suction of water, fluids, and material handling.	1/2" to 12"	Tubular steel, stainless, malleable iron, aluminum, or brass with serrated shank. NPT male threads, grooved, or beveled for welding.	Clamps or bands.
	Steel Nipple	Wide variety of medium to high pressure applications including water.	1/4" to 1"	Machined from cold drawn bar steel, heat treated for toughness.	Interlocking clamps.
	Single Bolt Clamp	Low or medium pressure service on shank couplings, combination nipples, and pipe nipples.	7/8" to 5-1/4" hose O.D.	Cast malleable iron, cadmium plated.	Bolted down tightly on hose.

Common Coupling Devices (cont.)

Picture	Name	Service	Size Range	Description	Attachment
	Double Bolt Clamp	Heavy duty applications with large sizes of combination nipples or couplings.	3-1/2" to 17-1/2" hose O.D.	Cast malleable iron, cadmium plated, and brass.	Applied over hose and bolted into position.
	Band Clamp	Low or medium pressure for air, water, and suction service.	3/4" to 6" hose O.D.	Pre-formed flat, stainless steel or high-carbon steel.	Special locking band tool.
	Wire Hose Clamp	Suitable for medium or high pressure air, water, or general purpose hose. Good for hose with helical wire or corrugations. Available in larger sizes for pin lug, serrated pipe nipple, or combination nipples.	5/8" to 13-1/4" hose O.D.	Pre-formed round wire made of stainless steel, galvanized steel, copper, bronze, or aluminum.	Wire ends pulled and crimped with special tool or machine.
	Brass Ferrule	Low or medium pressure air or water using general purpose hose and brass inserts.	29/64" to 1-1/2" hose O.D.	Made from various gauge brass tubing. Stamped with Standard Industrial Part Number.	Crimped on using either ribbed or plain die.
	Flange	Often used for connections in corrosive applications or for connections to rigid piping systems.	1" to 24" hose I.D.	Made of rubber (with or without metal backing plates), aluminum, cast iron, or forged steel.	Some flanges are integrally molded into the hose, or the flange end is inserted into the hose and clamped or banded to the hose end.