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TANK DRAIN SYSTEMS
Draining rain water from an external floating roof is important to make sure the external floating roof will not built up too much water on top, which could even cause sinking of the roof.
W.E.Couplings Ltd offer an excellent solution by manufacturing tank drain hoses for this application. The major advantage of a hose is that it does have a minimum number of connections, therefore eliminating much of the potential problems with other drain systems. As the drain hose is a complete system,
including the connections, the lead ballast cable system is installed prior to dispatch.Each hose is individually tested prior to shipment, to ensure its
performance. As a result of the flexible nature of the drain hose, it will even be able to deal with frozen rain water inside.
Applications:
Flexible hose assemblies for immersion inside storage tanks to drain rainwater from the floating roof. Specially compounded covers are used to resist immersion in high aromatic or corrosive liquids
Lining:
Smooth bore, mandrel built, Nitrile (NBR) or Neoprene (CR) lined hose, depending on the type of hose specified or required
Reinforcement:
Textile cord reinforcement with a high tensile wire helix to resist collapsing by external pressure when immersed
Pressure:
Although these hoses are rainwater drains experiencing low pressures when in use, the integrity of the hose assemblies is checked, after ballasting, by testing to 10 bar with water and vacuum testing to -0.85 bar. Full and detailed test and material certificates are supplied as a standard
Cover:
Smooth wrapped finish in the following materials:
Rubber quality Content
PVC/Nitrile Aromatic content up to 80%
Viton ® Aromatic content up to 100%
Lead ballast and branding:
Each hose assembly incorporates a permanently attached lead covered
stainless steel cable to prevent the hose from floating in the stored product.
A longitudinal white stripe is permanently branded on the cover of each hose
to ensure correct alignment. All hoses are supplied electrically continuous.
Clamps and chains for roof attachment are supplied
Flanges:
Generally mild steel nipples with fixed ASA150 R/F flanges are supplied. Other flanged drillings and material types are available including swivel flanges. The ballast connection is a stainless steel threaded section permanently welded to the hose nipple. The ballast is secured with two threaded stainless steel nuts retaining the cable loop which is itself secured with two stainless steel U type clamps with double nuts.
W.E. Couplings Ltd
Units 2-3 Grimeford Industrial Estate
Anderton, Lancashire
PR6 9HL
sales@we-couplings.com
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