焊接式接头                                                   卡套式接头

订货示例：W-EW-S16×2,“×2”表示壁厚S为2                   订货示例：C-EW-S16

带O型圈软密封扩口式接头                                      接头体

                                                          订货示例：EW-S16

   单订扩口式接头体在前加“X”，如XF-EW-S16