SPECIAL TOPIC : HOSE ASSEMBLIES
stainless steel , or brass joints . These hose assemblies are mainly used on military and civilian ships .
Connections like Geka , Tankwagen , Guillemin are analogues of the Storz system , and have a similar range of diameters and materials used in the manufacture . The primary difference between the two is that the Tankwagen connection has 12 claws instead of two or three . All connections of this type are used as a temporary solution and are not used on a permanent basis .
that vary from 1 " to 6 ". Connections can be presented in the form of a counterpart with an internal or external thread and a flanged end . This is perhaps one of the most common connections in the world ( since they are very easy to install on a hose ) as this design is enough to insert the fitting inside and squeeze it from above with a clamp using a wrench . No special qualifications are required from the service personnel preforming these types of assembly .
Sealing In order to ensure adequate hose sealing , special rubber hoses are used which can be made of both EPDM rubber and Teflon , especially if special resistance to high temperatures and aggressive pumped medium is required .
Auxiliary and extremely useful equipment for hose assemblies can be special suspension devices , such as hosebuns . They are used in cases where it is necessary to exclude the hose from the hall in the case of its hanging above the ground . Hosebun is made of special urethane and can support hose assemblies with diameters from 32mm up to 300mm .
One of the negatives of the aforementioned connection is its division into female and male counterparts . This situation can be problematic if the operator buys two hoses to connect to each other and both ends are male ; the hose will have to be supplied with the matching half . In the case of a line length of several tens of meters , it can create certain inconveniences during installation .
Hose assemblies of the Storz type are a universal joint , which is not divided into male and female counterparts , but is rather a coupler with several canines ( two or three claws depending on the diameter ). Connection diameters can range from 1 " to 6 "; from 4 " onward a special wrench is required and manual installation is difficult .
Tankwagen couplings .
It is worth noting that different manufacturers have a different distance between the canines , or the so-called KA . Therefore , this is the main parameter that should be monitored during assembly of Storz . For example , for a 2 1 / 2 " connection , the distance between the claws can be 81mm or 89mm . It is very difficult to see this difference , and therefore , this feature should be taken into account prior to assembly . The fangs are also quite fragile and can be damaged if dropped from a height , so the material of manufacture should be considered ; this is also true of Camlock aluminum ,
Each country has its own specific standards of connections used for hose assembly , many of which are regulated at the state level . It is common that the connection within a hose is used only within one country and is not known to the rest of the world . For example , in Russia , a Bogdanov type connection is used for fire hoses and is not seen in other countries . Thus , whether it is a manufacturing enterprise , or a ship , or even a private user , it will always be possible to find the right hose assembly . Everything will depend only on the cost and the process . It is also important to take the requirements of the application into consideration when selecting which type of assembly is most suitable for the hose at hand .
ABOUT THE AUTHOR Jurij Artiukhov works as the General Manager at PipeTime , LLC . He previously worked as a Sales Manager for MTT Company and Project Manager for SOL SP Company . He holds a graduate degree from the University of Foreign Affairs , Economy and Law .
20 Hose + Coupling World , December 2021