1. Application of product:The shell manhole is loacated on the bottom of tank. The control pressure is +200 mm, =-45 mm water column. Please tell us the product name, model, drawing number when ordering the product; The customer can provide standard and non-standard manholes drawing for processing production. In order to increase the supporting force and enhance the safety and convinience of manhole, there are manhole with core and the derrick manhole. Please tell us name, specification, drawing number when ordering. The customer can provide standard HG/T 21514 ~ 21535-2005 and non-standard manholes drawing for processing production.

2. Specifications of product: