| 法兰螺栓紧固方法 |
| 添加时间：2019/12/13 15:23:59 浏览次数： |
| 螺栓紧固方法 Bolt fastening method ● 无力矩梅花扳手或捶击扳手：适用于一般设备及管道法兰紧固，根据螺栓尺寸和法兰压力等级选用。紧固要求如下： ● torque free ring spanner or hammer spanner: applicable to fastening of general equipment and pipeline flange, selected according to bolt size and flange pressure grade. The fastening requirements are as follows: 1） 维保单位制定紧固方案，对法兰按对称紧固，进行紧固顺序编号，参考图 1 ，图 2 编号。 1) the maintenance unit shall formulate the fastening plan, fasten the flange symmetrically, and number the tightening sequence, referring to figure 1 and Figure 2. 2） 在 1 ， 2 ， 3 ， 4 的位置用 4 个螺栓为垫片进行定位，确保缠绕垫片中心在突缘边沿以内。 2) use 4 bolts to position the gasket at the positions of 1, 2, 3 and 4 to ensure that the center of spiral wound gasket is within the flange edge. 3） 用手紧固定位螺栓，接着插入其它螺柱螺栓并手紧使其载荷平衡，确保螺母两端每端至少露出 2 个螺纹在外。 3) tighten the positioning bolt by hand, then insert other stud bolts and tighten them by hand to balance the load, ensuring that at least two threads are exposed at each end of the nut. 4） 根据现场设备及法兰，按紧固一圈为一次计算，合理制定紧固次数（至少 3 次）和每次紧固的捶击载荷（力度），紧固捶击载荷（力度）按从小到大依次紧固（如 50% ， 80% ， 100% 递增），不可加载载荷过快过大，防止垫片密封失效。 4) according to the field equipment and flange, the tightening times (at least 3 times) and the hammering load (force) for each tightening shall be reasonably determined according to the calculation of one circle of tightening. The tightening hammering load (force) shall be tightened from small to large (such as 50%, 80%, 100% increase), and the overload shall not be too fast or too large to prevent gasket sealing failure. 5） 无力矩梅花扳手或捶击扳手每次紧固的顺序： 5) tightening sequence of ring spanner or hammer spanner without torque: 紧固径向相对的两个螺栓至螺栓既定锤击载荷（力度）； Tighten the two bolts diametrically opposite to each other to the given hammering load (force) of the bolt; 紧固与前次两螺栓沿圆周相距约 90 度的另一对螺栓； Fasten another pair of bolts about 90 degrees away from the previous two bolts along the circumference; 继续紧固直到其余所有螺栓皆紧固至既定锤击载荷。 Continue tightening until all remaining bolts are tightened to the established peening load. 6 ）最后按 100% 锤击载荷（力度）将所有螺栓按顺时针或逆时针方向依次紧固一遍。 6) at last, tighten all bolts clockwise or anticlockwise according to 100% hammering load (force). |
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