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Standard Handbook of Engineering Calculations Episode 8

Tham khảo tài liệu 'standard handbook of engineering calculations episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | MECHANICAL ENGINEERING MECHANICAL ENGINEERING 3.465 FIGURE 23 End- and intermediate-anchor loads in piping systems. Yarway Corporation. upward into the joint for a distance of 3.74 in 95 mm as computed in step 1. Therefore a singleend anchored joint with a 4-in 101.6-mm traverse will be suitable. 3. Compute the anchor loads in the pipeline. Use Fig. 23 to determine the anchor loads on intermediate and end anchors those where the pipe makes a sharp change in direction . Enter Fig. 23 at the bottom at a pipe size of 20-in 508-mm diameter and project vertically upward to the dashed curve labeled intermediate anchor all pressures. At the left read the anchor load at each intermediate anchor A D and F as 20 000 lb 88.9 kN . Note that the joint expansion load joint contraction load 20 000 lb 88.9 kN . Then end anchors B C and E have from Fig. 23 a possible maximum load of 58 000 lb 258 kN found by projecting vertically upward from the 20-in 508-mm pipe size to 125-lb in2 gage 862-kPa steam pressure which lies midway between the 100- and 150-lb in2 gage 689.5- and 1034-kPa curves. Indicate the possible maximum end-anchor loads by the solid arrows at each elbow as shown in Fig. 21. The resultant R of the loads at any end anchor is found by the pythagorean theorem to be R 58 0002 58 0002 0 5 82 200 lb 365.6 kN . Indicate the resultant by a dotted arrow as shown in Fig. 21. Contraction loads on the end anchors are in the reverse direction and consist only of friction. This friction load equals the joint expansion load or 20 000 lb 88.9-kN . The resultant of the joint expansion loads is 2o 0002 20 0002 0 5 28 350 lb 126.1 kN . Locate guides within 25 or 12 ft 7.62 or 3.66 m of the expansion joint depending on the type of packing used Table 34. These guides should allow free axial movement of the pipe into and out of the joint with minimum friction. Related Calculations Use this procedure to choose slip-type expansion joints for pipes conveying steam water air oil gas and .