For ductile iron covers, we have been very concerned about, but often ignored the ductile iron manhole covers of the importance of the ring, and today we will talk about the manhole cover of ductile iron manhole inspection skills.
1, check: check the diameter of ductile iron covers the diameter of the time, should accept the special things will be held, ductile iron covers Zhijiang control after covers the size category, depth of 40mm, detection of bolt hole time should use special fixture held by inspection.
2, inspection covers: must be strict according to the country corresponding inspection scale held。
3, inspection of cast iron manhole cover spray paint results。
Check 4, ductile iron manhole cover roughness: check time can be accepted for special inspection at.
5, testing the combination of ductile iron manhole cover, to ensure that the cast iron manhole cover after the placement and utilization, there will be no sway and noise, covers and wells together, no more than 1 mm.
6. The surface of the ductile iron manhole cover: there is no significant casting defect, and the casting pattern is more clear.
The above is the Shandong ductile iron manhole cover to share, you still satisfied with it, welcome to our website: http://www.kpp647.com/ and pay attention to our products, we will provide you with excellent products, sincerely wish to establish business relationship with you.