英制管螺纹美制管螺纹对照表英制管螺纹美制管螺纹对照表(若需要原件请留言) 2008-06-03 16:57分类:专业知识字号: 大中小英制管螺纹美制管螺纹对照表英制管螺纹英制管螺纹美制管螺纹钻孔径标准径有交牙钻孔径标准长部之长度(最NPT 规格标准径规格不用纹刀度(最小)中规格最大最小使用纹刀时小)中之毋螺NPS 时之毋螺牙内径使用绞刀时不用绞刀时牙内径PS 1/16-28 6.50 6.632 6.490 PT 1/16-28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35 PS 1/8-28 8.50 8.637 8.495 PT 1/8-28 8.10 8.20 8.249 8.388 1/8 - 27 8.33 8.43 8.7411.0PS 1/4-19 11.40 11.549 11.341 PT 1/4 -19 10.70 10.962 11.174 1/4 - 18 10.72 11.13 11.13 014.5PS 3/8-19 15.00 15.054 14.846 PT 3/8 -19 14.20 14.448 14.658 3/8 - 18 14.27 14.27 14.68 018.0PS 1/2-14 18.50 18.773 18.489 PT 1 /2-14 17.60 17.979 18.263 1/2 - 14 17.48 17.86 18.26 023.5PS 3/4-14 24.00 24.259 23.975 PT 3/4 -14 23.00 23.378 23.663 3/4 - 14 22.63 23.01 23.42 029.5PS 1-11 30.20 30.471 30.111 PT 1 -11 29.00 29.459 29.822 1 - 11-1/2 28.58 28.98 29.36 0electricity at no cost, revenue from electricity sales. Poverty alleviation to the removal, to desperate farmers out of poverty, in conjunction with urbanization, new communities are centrally placed. Poverty in the enterprise, enterprise more powerful, more social responsibility, they should allow more people to enjoy the fruits of development. Conditions to encourage private enterprises to establish Charity Fund for poverty alleviation, employment, grants, financial aid and other forms of poverty alleviation activities, let povertyalleviation aid corporate social responsibility in the specific embodiment, the proper meaning of giving back to the community. Finally reveals to implement poverty alleviation policies, older age, incapacity, cannot be achieved through industry support and employment support, such as poverty, children and unable to support the poor, Lo-Fi policyreveals the role to play, eventually incorporated into the low range,and fundamentally solve the problem of poverty. (C) establishing and perfecting retreat mechanism. Poverty alleviation is a dynamic project, we must strengthen the farmers ' information management, dynamic management of poor, really "poor" no place to hide, "poverty" a timely exit, "poor" and "return to the poor" get maximum support and help. To build up the information network system of the poor, poverty the basic information and dynamic entry to the system, to implement dynamic management. According to pro-poor development, timely adjustment on38.0PS 1-1/4-11 38.80 39.132 38.772 PT 1 -1/4-11 37.50 37.976 38.339 1-1/4-11-1/2 37.31 37.69 38.10 044.0PS 1-1/2-11 44.80 45.025 44.665 PT 1 -1/2-11 43.40 43.869 44.232 1-1/2-11-1/2 43.66 44.04 44.45 055.5PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.90 55.412 55.844 0NPT螺纹PT螺纹G螺纹和公制螺纹的区别NPT，PT，G 都是管螺纹(( PS——日本管螺纹 )NPT 是 National (American) Pipe Thread 的缩写，属于美国标准的 60 度锥管螺纹，用于北美地区(国家标准可查阅 GB/T12716-1991 PT 是 Pipe Thread 的缩写，是 55 度密封圆锥管螺纹，属惠氏螺纹家族，多用于欧洲及英联邦国家(常用于水及煤气管行业，锥度规定为 1:16( 国家标准可查阅 GB/T7306-2000G 是 55 度非螺纹密封管螺纹，属惠氏螺纹家族(标记为 G 代表圆柱螺纹(国家标准可查阅 GB/T7307-2001另外螺纹中的1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英吋(行内人通常用分来称呼螺纹尺寸，一吋等于,分，1/4 吋就是,分，如此类推(G 就是管螺纹的统称(Guan)，55，60度的划分属于功能性的，俗称管圆。

即螺纹由一圆柱面加工而成。

ZG俗称管锥，即螺纹由一圆锥面加工而成，一般的水管接头都是这样的，国标标注为Rc公制螺纹用螺距来表示，美英制螺纹用每英寸内的螺纹牙数来表示，这是它们最大的区别，公制螺纹是60度等边牙型，英制螺纹是等腰55度牙型，美制螺纹60度。

electricity at no cost, revenue from electricity sales. Poverty alleviation to the removal, to desperate farmers out of poverty, in conjunction with urbanization, new communities are centrally placed. Poverty in the enterprise, enterprise more powerful, more socialresponsibility, they should allow more people to enjoy the fruits of development. Conditions to encourage private enterprises to establish Charity Fund for poverty alleviation, employment, grants, financial aid and other forms of poverty alleviation activities, let povertyalleviation aid corporate social responsibility in the specific embodiment, the proper meaning of giving back to the community. Finally reveals to implement poverty alleviation policies, older age, incapacity, cannot be achieved through industry support and employment support, such as poverty, children and unable to support the poor, Lo-Fi policyreveals the role to play, eventually incorporated into the low range,and fundamentally solve the problem of poverty. (C) establishing and perfecting retreat mechanism. Poverty alleviation is a dynamic project, we must strengthen the farmers ' information management, dynamic management of poor, really "poor" no place to hide, "poverty" a timely exit, "poor" and "return to the poor" get maximum support and help. To build up the information network system of the poor, poverty the basic information and dynamic entry to the system, to implement dynamic management. According to pro-poor development, timely adjustment on 公制螺纹用公制单位，美英制螺纹用英制单位。