HOME >> news
How to check the quality of butt welding elbow from appearance?When many users purchase butt-welding elbows, because they do not have professional testing equipment, they can only check the quality of butt-welding elbows from the appearance at this time. The following are several common judgment met
With the continuous construction of urban society, the demand for ductile iron manhole covers is also increasing, so what does the quality of ductile iron manhole covers depend on? What are the factors that affect the quality of ductile iron manhole covers?1. Design processability: When designing, i
In the manhole covers on the road, we often see cast iron manhole covers that are uneven to the road surface, which affects the travel of pedestrians and vehicles. Why does the nodular cast iron manhole cover sink? Investigating the root cause, the sinking of t
Ductile iron manhole cover is a kind of manhole cover that is used a lot nowadays. It is quite famous in the manhole cover industry. It has been very popular in the manhole cover industry in recent years. Why is nodular cast iron manhole cover so popular? Take a look You will know its advantages:Lis
0086-311-85110778
0086-18603292989
lilian_1104
kingmetalcc
