Whether the steel-plastic transition joint needs to be installed in a flat or vertical position, CJJ63-28 Technical Specification for Polyethylene Gas Pipeline Engineering, 5.5 The connection of steel

Whether the steel-plastic transition joint needs to be installed in a flat or vertical position, CJJ63-28 Technical Specification for Polyethylene Gas Pipeline Engineering, 5.5 The connection of steel-plastic transition joint is not clear. it is stipulated in cjj/94-29 that the buried part of the lead-in pipe is connected with the buried PE pipe, and the connection point is not less than .5m from the building foundation. Two points of view that I agree with: I am afraid that the steel-plastic transition will be broken due to settlement. To sum up, I personally think that it is more appropriate to bury the ground and pack it in paperback. Welcome friends and teachers to guide us.