1, tube Hose Clamps valve is mainly used in low pressure environment, generally lower than the PN16, high pressure pipe Hose Clamps valve the world only a few companies can manufacture.
2, because the tube Hose Clamps valve is a rubber casing as the core of the valve, so the use of a certain temperature limit, usually -40 ~ 200 ℃ or less.
3, limited by the rubber process, in line with the quality of casing under the premise of the strength of the tube Hose Clamps valve manufacturing diameter is usually within DN300mm. Large diameter pipe clamp valve relative price is higher, can manufacture the ability of very few manufacturers. At present, the world's largest caliber tube valve is the United States produced by the US valve DN1800mm pneumatic valve Hose Clamps valve, used in the United States Indianapolis municipal project.
Followed by the domestic trial of imitation. At present, there are many large and small manufacturers have introduced a tube Hose Clamps valve, with ultra-low prices quickly occupied some of the market, just to contact the valve users have brought some errors, such as: pipe clamp valve life is too short , Usually a few months on the pipe is broken, and even a month on the bad, and its grasp of the rubber process is not enough to produce high wear resistance, high corrosion resistance, high life rubber sleeve. According to research, the first batch is still in existence. Even the most common import tube Hose Clamps valve, the average service life is much longer than the domestic long. Of course, the user can choose according to the actual situation, after all, relatively high price of imported valve products.
From the current situation of the National Standardization Technical Committee of plastic pipe, pipe clamp and pipe sub-technical committee was informed that there are seven plastic pipe, pipe clamp and pipe new national standard has been formally implemented.
The seven new national standards are: GB / T15819-2006 Irrigation of polyethylene (PE) pipe by the plug-in pipe caused by environmental stress cracking test method and technical requirements, GB / T5836.1-2006 Building drainage (PVC-U) pipe for construction drainage, GB / T10002.1-2006 Polyvinyl chloride (PVC-U) for water supply, GB-T5836.2-2006 Polyvinyl chloride (PVC-U) ) GB / T20201-2006 Acrylonitrile-butadiene-styrene (ABS) pressure piping systems - Part 1: Pipe, GB Acrylonitrile - butadiene - styrene (ABS) pressure piping systems - Part 1: Fittings - T20207.2-2006.
According to Zhao Qixui, secretary general of the Technical Committee of Plastic Pipe, Pipe Fittings and Pipe Fittings, the new national standard is based on international standards. According to the changes in domestic and foreign materials technology, pipe processing technology and environmental protection requirements, Was revised. Among them, the water supply PVC-U pipe GB revision of the main technical content: increased the value of the resin K, prohibit the use of lead salt stabilizer to improve the impact of falling hammer impact test energy, some of the relevant foreign advanced standards Technical indicators, the adjustment of the hydraulic test of the ring stress, an increase of system suitability test and size grouping and stereotypes, etc .; building drainage with PVC-U pipe and pipe GB, specifications from 40mm ~ 160mm expanded to 32mm ~ 250mm, and municipal drainage With the pipe size is different, the pipe connection to increase the sealing ring connection, cancel the 'excellent products' and `qualified products` classification, an increase of pipe, pipe fittings size requirements. In the whole Hose Clamps market began to have a new trend in the future Jiangsu Custer Hose Clamps will make a greater contribution to the pipeline fixed.
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