standard               outside            thinkness          working pressure          working

diameter(mm)        (mm)                  (mm)                     (Mpa)              journey(mm)

          15               21.25                  2.75                         59                       320

          20               26.75                  2.75                         59                       320

          25               33.50                  3.25                         59                       320

          32               42.25                  3.25                         59                       320

          40               48                       3.50                         59                       320

          50               60                       3.50                         59                       320

          70               75.5                     3.75                        59                       320

          80               88.5                     4.00                        59                       320