1991年3月5日,国家物价局和中国石油天然气总公司联合发出《关于提高管道输油、输气运价的通知》,主要内容如下: (一)按保本微利的原则,管道输油运价由目前平均每吨公里2分6厘4调整为3分2厘9;管道输气运价每立方米提高3厘。 (二)改革现行不合理的运价结构,按管径大小、输距长短合理安排差价。大口径、长距 March 5, 1991, the State Price Bureau and China National Petroleum Corporation jointly issued the “Circular on Improving Pipeline Oil, Gas tariffs,” the main contents are as follows: (A) according to the principle of principal and interests are protected, pipeline transportation The price is adjusted from the current average of 2 cents to 6 cents per tonne kilometer to 3 cents to 2 cents; and the freight rate of piped gas increased by 3% per cubic meter. (B) the reform of the current unreasonable tariff structure, according to the size of the pipe, transmissibility of the length of the reasonable arrangements for the difference. Large diameter, long distance