焊接式接头                                                   卡套式接头

订货示例：W-TV-L12×2，“×2”表示壁厚S为2                    订货示例：C-TV-L12 

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

                                                           订货示例：TV-L12

单订扩口式接头体在前加“X”，如XF-TV-L12