I have some doubts regarding the use of elbows on pipes.
Thread Content
This post was last edited by z642150 on 2019-8-25 at 14:48: Installation of elbows on regular pipes. Pumps generally use large and small ends in the “top-bottom-top” configuration. What about steam flow or two-phase flow? Furthermore, there is an installation method that uses a bottom flat surface before the inlet flow control valve and a top flat surface after it. What are the advantages of this mounting method with different sizes at the front and back? It’s not just steam; this type of installation is also used for pipes with flowing liquids. Help.
Is there regulation for gas-liquid two-phase flow? Reduce gas phase passage?
:lol:lol:lol:lol:lol It’s a clever way of making effective use of it, which can be used for adjusting deviations; P is really talented. According to the standard, a concentric reducer should be used at this position; but what should be done if gas is present in the case of a non-concentric reducer installed on the left side? Oh, maybe there’s a standpipe installation somewhere later on, or something else? ? ? It is recommended to check the installation diagram.
Why is there a straight weld on the left side of the valve?
Steam pipes generally use concentric reducer pipes, as pipe stress calculations are involved, and concentric reducer pipes can withstand stresses better.
Judging from the ratio of weld caps to mineral water bottles, the pipe diameter is over 500; it might be a stainless steel pipe with a diameter of 600. Large-diameter stainless steel seamless pipes are hard to find, and since there are no spiral-wound stainless steel pipes, straight-seam pipes have to be used instead.
There are no long-distance photos, so it’s just a guess: unless there is a special design, the pipe on the left side is one that leads down from the upper platform (if it’s meant to go up to the upper platform, a drain pipe should be added on the left side); the pipe on the right side is one that leads to the same platform or to the lower platform. This helps to understand why an eccentric reducer is used in this way. Aside: 1. Wooden blocks and planks used as fixtures for the installation of large-diameter pipes and valves are extremely dangerous. The slenderness ratio of the 200-mm short pipe on the left side is also high; if it loses stability, it could cause damage to the valves and injuries to people. This *habit of the workers is very bad. 2. The platform holes should be protected.
It’s the first time I’ve seen such construction: o
There is clearly a one-way valve sandwiched in the middle
The pipes in the gas phase must have a flat bottom. If liquid condenses inside, it will cause water hammer.