纤维水泥管外压荷载专用试验机外压荷载试验步骤：
External pressure load test procedure of special testing machine for external pressure load of fiber cement pipe:
1.将预先置于20℃±5℃的水中浸泡48h后的试件取出，用湿布擦干，用钢卷尺测量试件的长度，修约至1mm；用游标卡尺测量纤维水泥管内径;
1. After 48 hours of immersion in water at 20 5 C, the specimens were taken out and dried with wet cloth. The length of the specimens was measured with steel tape gauge, and the diameter of the fibre cement pipe was measured with vernier caliper.
2.将样品安放在预先放置好橡胶板的V字型托架上;
2. Place the sample on the V-shaped bracket with the rubber plate in advance.
3.移动V字型托架，将V字型托架放置在外压试验机承压台面的中心位置上，使试件的中心点与试验机的中心点吻合;
3. Moving V-type bracket, the V-type bracket is placed in the center position of the bearing table of the external pressure testing machine, so that the center point of the test piece coincides with the center point of the testing machine.
4.在管子受压线上放置橡胶板，橡胶板上安放好上压块;
4. Place a rubber plate on the pressure line of the pipe, and place an upper pressure block on the rubber plate.
5.开启试验机，以400N/s~600N/s匀速加荷至产品标准规定的最小外压荷载值时，管子不应破坏;
5. When the test machine is opened and the minimum external pressure load specified in the product standard is loaded at a uniform speed of 400N/s~600N/s, the pipe should not be damaged.
6.继续匀速加荷，直至管段破坏，记录破坏荷载，修约至100N；
6. Continue loading at uniform speed until the pipeline section is damaged. Record the damage load and repair it to about 100N.
7.用游标卡尺在试件两端及中间测量管子破坏处管壁厚度e，修约至0.1mm。
7. Use vernier caliper to measure the wall thickness e at both ends and in the middle of the specimen, and repair it to about 0.1 mm.