Urgent help needed regarding the selection and installation of chemical industry compensators
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Dear all: I would like to seek your advice regarding the selection and installation of chemical industry compensators. The relevant details are as follows: temperature 130 degrees, pressure 0.6 Mpa, pipe diameter 65 mm, pipe length 54 m, material 00Cr19Ni10, and the medium is urine. How do I choose the model of the compensator, and what are the installation considerations? Thank you!
The linear expansion coefficient of 00Cr19Ni10(304L) is 17×10-6/°C. With a temperature difference of 130 – (-20) = 150°C, the thermal expansion amount for the pipe is 17×10-6/°C × 150°C × 54 m = 0.1377 m = 137.7 mm. A bellows compensator is selected, with a design pressure of 1.0 MPa and a design temperature of 200°C℃ ； Flange connection ； Bellows material: 316L, double-layer structure ； Material for Takeover, flange, and guide pipe: 304L ； The material of the tie rods and ear plates is Q235-A. Under the condition of ensuring stability, the maximum wave number for a set of DN65 bellows is 12 waves, the compensation amount is 40 mm, and the fatigue life is 1000 cycles. To reduce the number of bellows compensators while ensuring safety, a compound rod axial-type bellows compensator with a large compensation capacity and two sets of bellows (2×12=24 bellows) is used; its compensation capacity is 80 mm, the installation length is 700 mm, and the price per unit is approximately 3,000 yuan. 2 units are selected. For a 54-meter long straight pipe, a fixed support is installed at each end of the 54 meters (if the pipe ends are connected to larger containers, those containers can be considered as fixed supports), and another fixed support is placed in the middle. This middle support divides the 54-meter length into two sections of 27 meters each. A dual-rod axial bellows compensator is installed for each 27-meter section, near either fixed support. ssong_zhiguo@126.com Welcome to communicate and improve together.