2022 PRODUCTS CATALOG - INDUSTRIAL HOSE, COUPLINGS AND EQUIPMENT

Steam Hose Steam and Its Effects on Hose Water can exist in three different basic states – solid, liquid or gas – and there are three different conditions of the gas (steam). The pressure and temperature present dictates the particular condition of the water. These conditions are wet saturated steam or “ wet steam ” , dry saturated steam, and superheated steam or “ dry steam ” . By way of explanation, refer to the steam chart. The heavy red line is the boiling point of water at various gauge pressures. Any point on this line represents saturated steam. Saturated steam may be completely free of unvaporized water particles, or it may carry such particles. In other words, saturated steam may be “ dry ” or “ wet ” . Any point below the line represents hot water – any point above the line represents superheated steam. The dotted line shows the process of saturated steam being transformed into superheated steam. If a steam line is at a pressure of 150 psi and a temperature of 366 ° F, it contains saturated steam. If the pressure is substantially reduced by the expansion of the steam (such as the sudden opening of a value or the steam passing into a larger pipe or hose), the condition of the steam follows the dotted line to some point X in the superheated steam area. This condition may not last very long, but the superheated steam tends to deteriorate the tube stock in ordinary steam hose intended for use with saturated steam. This usually results in hose failure. Maintenance Steam hose failure can cause SERIOUS injury. Therefore, it is extremely important to properly select and maintain steam hose. Rules to Remember Rule Reason Steam hose should be sued to transfer ONLY steam! Never use it to transport other materials. The hose is specially designed to handle steam. Materials other than steam could damage the tube. Couple steam hose to a length of pipe to separate the hose from the steam source. Constant high heat can shorten the life of a steam hose. Always have an accurate pressure gauge and positive shutoff valve installed between the steam source and the hose. A surge in the hose could cause a failure and injury. Operators should always wear protective clothing, which includes face or eye protection, heavy-duty clothing, gloves and boots. This provides protection from flying particles and liquids. Operators should NEVER open a steam valve when the hose is lying free. The sudden surge in pressure can cause the hose to whip, which could cause injury or damage. ALWAYS drain steam hose when not in use. Water remaining in the hose may be absorbed by the tube. When the hose is then reheated and still under low pressure, the absorbed water may change to steam and “ popcorn ” or expand and explode the tube. Popcorning can weaken and destroy a hose. . STEAM HOSE www.gates.com 167 AGRICULTURE AIR BREATHING AIR DUCT AIR AND MULTI- PURPOSE CHEMICAL FOOD AND BEVERAGE ENGINE AND MARINE MATERIAL HANDLING MINING OILFIELD PETROLEUM PRESSURE WASH AND WASHDOWN STEAM WATER CLAMPS COUPLINGS AND FERRULES HOSE FINDER CHEMICAL RESISTANCE TABLE