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Why Are You Test The Manhole Cover Not Reach D400 Load Grade

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Sometimes we need to order several manhole cover to test its load. No question, place big order.
manhole cover
During this time, there are several important question:
1.Before the manhole cover test, is it no broken.
2.Is it a standard testing agency?
3.Which test standard?
4.The test load is it manhole cover failure load
5.Is the frame suspended?
6.if manhole lid have screw lock, check is it use same force to lock the frame.
All in all, if you want to confirm the manhole cover load rating, we  need to follow the correct step and then we can get correct conclusion. If you want to know more details, please follow our website and welcome any inquiry.
Zibo Best Energy-saving Materials Co., Ltd. was established in 2004, specializing in producing and supplying composite materials(SMC/BMC) manhole cover, drain grating ,tree-grating, gully grating. Strictly in accordance with BS EN124 and have obtained various kinds of certificates. Till now, our competitive products not only have good market in domestic, but also owned a large overseas market with a high reputation.
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