HondaTuner

STFU Noob.

#2 says they CAN'T do it. My option means they just don't care. :1

bitchasscracker

i knew it. you are that gay guy from extreme home make over

widebody93

I HAD TO CHANGE MY ACCOUNT, soem jewish bastard just stole my account. CRACKER!!!!!

jinxy

you're definitely :1

drunkinmaster1

OK, i blew off the dust on my old " BLUE BOOK OF FITTERS . . . WELDERS PATTERN AND LAY-OUT MANUAL" and heres the specs......


in the fabrication of multi-welded tube turns it is 1st necessary to establish the degree of direction change, number and length of pieces to center. also radius may be figured one and one half times the designated pipe size being used.


three pieces. two welds. four angles. in welded tube turns there are always 2 angles for each weld.


EXAMPLE, 3 INCH PIPE

div. 90 degree turn = 22- 1/2 DEG. angle cut.
By 4 ANG.

tangent for 22 1/2 DEG. angle = .4142

(3) in. pipe O.D.= 3.50
Tan. 22 1/2 DEG.= .4142
C.B.= O.D. 3.50 x Tan. .4142= 1.44 or 1 1/2 in.

Div. 1-1/2 "= 3/4" from the center line.
By 2

(solution for radius)
one and the half times the pipe size equals the radius.
R.=1.50 x 3= 4.50 or 4 1/2 "

" length of pieces #1 and #2 "
#1.=radius times tangent of angle.
#1.=4.50 x .4142= 1.863 or 1-7/8 inches.

#2.=2 times the length of #1.
#2.=2x 1.863= 3.726 or 3-3/4 inches.

mad ill ms paint skillzz




in the fabrication of multi-welded tube turns it is 1st necessary to establish the degree of direction change, number and length of pieces to center. also radius may be figured one and one half times the designated pipe size being used.


four pieces. three welds. six angles. in welded tube turns there are always 2 angles for each weld.


EXAMPLE, 2 INCH PIPE

div. 90 degree turn = 15 DEG. angle cut.
By 6 ANG.

tangent for 15 DEG. ang. = .2679

(2) in. pipe O.D.= 2-3/8 in.
Tan. 15 DEG.= .2679
C.B.= O.D. 2.375 x Tan. .2679=6362 or 5/8 in.

Div. 5/8 "= 5/16"C.B. from the center line.
By 2

(solution for radius)
one and the half times the pipe size equals the radius.
R.=1.50 x 2= 3.00 or 3 "

" length of pieces #1 and #2 "
#1.=radius times tangent of angle.
#1.=3 x .2679= .8037 or 13/16 in.

#2.=2 times the length of #1.
#2.=2x .8037= 1.6074 or 1-5/8 in.

0b00st0

That book makes things way more complicated than they need to be.

What is the point of having TWO different sized pieces.

The #1 piece is worthless as it is still parallel with the originating tube.


The worst part is that the design does not make a true radius, this is not ideal for flow.

con

Shhh, That’s the sound of nobody caring about you.

drunkinmaster1

those are just examples
the 1st bend is just an example for one kind of bend ( 4 angle) not really the best for flowrate on an exhaust setup. but works good on drain or gas lines and has fewer cuts. can also be used for a dumptube, rollcage, etc..
the 2nd would be the more realistic figure to go with. but yes it's more complicated than is really needed to fabricate the part wich is my point to begin with. these formulas are necessary for pipe fitters to pass their exam for a license, but not really practical in a the real world. kinda like a surgeon needing calc 3, or organic engineering even though they probably will never use those formulas that they are tought in the real world.
but thats my whole point, set your chopsaw at an 11.25 deg. angle and chop away with the 1st 2 cuts, lay them down and make your measurements from there. on the job when time is money, especally commercial , you learn how to use your eyes rather than punching out formulas.

0b00st0

That's how mistakes are made and it costs money and time.


My formula is simple as simple can get. If you can use a calculator, you can use the formula. It takes less than 30 seconds to punch out the length and 2 seconds for the angle. "Using your eyes" is a good way to waste material and time, both are bad for business.

0b00st0

Here's the downpipe and mani I did for my car. It's 3", uses 5 pieces per 90*, and has a CLR of 3".




I also added this to the sticky in the FI forum.