advantages of api rubber hose
Api rubber hoses have several advantages over non-API counterparts. For one, they offer high integrity and safety. These attributes are important to clients, who choose to do business with providers that meet the highest standards of hose integrity. They ultimately benefit their bottom line by gaining new business and enhancing the industry leader status. Furthermore, they benefit the environment. Using hoses that exhibit the highest levels of integrity prevents costly downtime, liability insurance claims, and injuries resulting from failure.
Two types of fiber yarns make a good hose: the filler and the warp. The warp yarns run down the hose and provide abrasion resistance. The filler yarns are made from filament polyester. These two types of fibers provide the strength necessary to resist internal water pressure. Moreover, spun polyester warp yarns are specially prepared by a yarn manufacturer. They are then shipped to the hose plant for manufacturing. They don't require any further preparation.
A good APi rubber hose can resist erosive wear better than steel pipeline. The resilience of rubber hose reduces particle degradation. It is an excellent choice for fluid and material conveying that requires high flexibility. These hoses are ideal for conveying fluids, gases, and abrasive materials. They can also be used for mobile conveying systems and vacuum off-loading.
disadvantages of api rubber hose
The American Petroleum Institute (API) approves a variety of hoses, including rotary drilling hoses and 7K hose assemblies. This type of hose is durable and strong, and it is resistant to temperature changes. It is also very resistant to mechanical deformation and twisting, and it is virtually impenetrable to ultra-violet rays. Its advantages over other types of hoses include its durability and low weight. There are disadvantages to using a rubber hose.
Elasticity is the first. Nitrile Rubber is the best choice for fuel transfer hoses. However, a higher level of acrylonitrile can adversely impact elasticity and compressibility. That is why a medium-acrylonitrile-content hose is often chosen for this type of application. NBR has high wear resistance and respectable mechanical properties despite its lower elasticity. It is not weather or ozone resistant.
Characteristics of api rubberhose
Flexible, oil-resistant Hose is required for many applications. Although there are many materials that can be used for oil and gas transfer (including rubber), only Nitrile Rubber is capable of enduring high temperatures. However, acrylonitrile with a higher content increases oil resistance but reduces elasticity and compression resistance. Medium acrylonitrile content is common in fuel transfer hoses. NBR hoses feature decent mechanical properties and high wear resistance, but they do not have ozone or weather resistance.
Despite its high-performance properties, a typical api rubber hose can still experience significant pressure drop. Many high-velocity, dilute phase conveying applications can experience problems with particle degradation or erosive wear. The pressure drop for a gas solid flow through a rubber pipe is actually higher than that of a pipeline made from steel. To test the difference between steel and rubber hoses, the author tested both materials with cement and a variety of airflow rates. The authors' findings showed that although the rubber hose was more resistant, the pressure drop was not much different than with steel. In addition, when airflow rates increased, pressure drops through the hose rose considerably. Fig. 8.5
Szentmihaly's study of elastomeric flow and stress in a hose leads to the creation of a connector with ridges that "swaged" the hose onto the metal reinforcement. This allows for the rubber and wire to bond together while the ferrule is driven into the reinforcement. The resulting axial movement causes the hose to move radially, which is why Szentmihaly's connector was a success. It ensured that the hose was held in place even under high pressure and compression.