pipe pitter theory

Types of measurement

English System
1 ward = 3 feet
1 foot = 12 inches
1 inch
Metric System
1 meter = 100 cm
1 centimeter = 10 mm
1 millimeter

ang pagsukat ng mga tubo ay tungkol sa inches, kasi sa measurement ang makikita mo lamang ay ang 1 inch lang. Paano nyo malalaman ang sukat ng 1 guhit sa 1 inch.
Mula sa 0 (zero) magsimula tayo sa unang guhit.
1st guhit = 1/16 or 0.06
2nd guhit= 1/8 (2/16) or 0.125
3rd guhit = 3/16 or 0.2
4rth guhit = 1/4 (4/16) or 0.25
5th guhit = 5/16 or 0.31
6th guhit = 3/8 (6/16) or 0.4
7th guhit = 7/16 or 0.44
8th guhit = 1/2 or 0.5
9th guhit = 9/16 or 0.56
10th guhit = 5/8 (10/16) or 0.62
11th guhit = 11/16 or 0.7
12th guhit = 3/4 (12/16) or 0.75
13th guhit = 13/16 or 0.81
14th guhit = 7/8 (14/16) or 0.9
15 guhit = 15/16 or 0.94
16 guhit = 16/16 or 2 inch na.

Pattern Development for a two piece 90 degree elbow
T.O. = N.P.S. x K
L(angle) of cut = Degree of Turn
(divide by) No. of Welds x(multiply) 2
No. of Welds = No. of pieces -(minus) 1
O.C. = m(pipe) x O.D.

Sinukat ay 2.4 inch or 2 3/8 inch
Ang pagsukat ay mula sa labas hanggang sa labas ng tubo.
T.O. = 2.4 inch x 1.5
= 3.6 or 3 5/8 inch.
No. of welds = 2 - 1
= 1
L(angle) of cut = 90 (degree) divide by
1 x 2
= 45 (degree)
O.C. = 3.1416 x 2.4
= 7.54 or 7 9/16 inch

2 pcs 90degree elbow
O.D. = 2.4 inch
O.C. = 7.54 or 7 9/16 inch
T.D. = 3.6 or 3 5/8 inch
L of cut = 45degree
ree)
divide by
1 x 2
= 45 (degree)
O.C. = 3.1416 x 2.4
= 7.54 or 7 9/16 inch

2 pcs 90degree elbow
O.D. = 2.4 inch
O.C. = 7.54 or 7 9/16 inch
T.D. = 3.6 or 3 5/8 inch
L of cut = 45degree