Do you mean "trench?"
If so it depends on the contents of the pipe, the material the pipe is made from, the environmental factors such as the likelyhood of earthquakes, ground temperature and ambient temperature and then socio-economic issues such as how often access is required to the pipe, whether or not a spill could cause environmental damage, whether or not an overground pipe would damage the look of the area, whether it is cost effective to put the pipe in a trench etc.
Generally speaking it is in everyones interest to keep a process pipe overground
You can put a liquid pipe snake down your drain or put a hose down there
It doesn't really matter. I usually put the female half, the side with the nut on first so I don't forget to put the nut on the pipe before I put that half on the pipe.
Mandrel for drifting the casing or drill pipe is forged with high-strength alloy steel, strict heat treatment process.
You put a drain auger down the pipe from the nearest cleanout. You will feel the blockage when you get to it, - then break it through and clear it with the auger.
seamed pipe is rolled cold and then the seam is welded down the length.rolled to whatever sizes needed.don't put a lot of pressure in a seamed system.
Taiwan sounds like talywain (a rough area near the tranch)
Put 4 pot in bottom left hand corner. Put flat 2 pot directly above it. Put tall 2 pot under 4 pipe at top. Put next tall 2 pot under 4th pipe 2. Put last tall 2 pot on right hand side under 3 pipe. Put down and right pipe under second from left 2 pipe. Put down and right pipe under 3rd 4 pipe from left. Then connect to vertical pipes with a right and down joining pipe. Put a down and right joining pipe on 5th 2 pipe from left. Put a down and left pipe on bottom of last 3 pipe.
You can put a liquid pipe snake down your drain or put a hose down there
simply put, a sparger pipe is a pipe designed to introduce gas into a liquid.
Put 3 poy on bottom left hand side. Put vertical pipes on 1st 3 pipe on left all the way down then connect to horizontal pipes and put a joining pipe up and right so it fills far right 3 pot. Put vertical pipes under second 3 pipe and a joining down and right pipe so it connects with horizontal pipes under long 2 pot. This should fill middle long 3 pot. On third 3 pipe from left put a joining down and left pipe. On 4th pipe 2 put a down and left joining pipe. On 4th pipe 2 put a down and left joining pipe then a horizontal pipe so it fills middle bottom 2 pot. On last 3 pipe put a down and left joining pipe so it fills bottom middle 3 pot.
Throw the pipe away and save your health.
It doesn't really matter. I usually put the female half, the side with the nut on first so I don't forget to put the nut on the pipe before I put that half on the pipe.
fertilizing industry
Put the pot under the main piping and simply put a horizontal pipe, elbow, vertical pipe, elbow, horizontal pipe.
PUT THAT IN YOUR PIPE AND SMOKE IT -- "Make what you can of what I've just said!; Digest that, if you can!; Put up with (or tolerate) that -- if you can!; 1824; Dickens in 'Pickwick Papers';
put a pipe in and suck!!
Smoking is a chemical process.