Mitered Bends - CAESAR II - Reference Data

CAESAR II Applications Guide (2019 Service Pack 1)

PPMProduct
CAESAR II
PPMCategory_custom
Reference Data
Version_CAESAR
11.0 (2019)

Evenly spaced mitered bends, whether closely or widely spaced, are defined by two parameters:

  • The number of cuts (changes in direction)

  • The equivalent radius or miter spacing

For closely spaced miters, the equivalent radius is equal to the code defined as R1 for B31.3 and R for B31.1. The equation for the equivalent radius to the spacing for evenly spaced miters is:

Req = S / [ 2 tan(q) ]

Where:

Req

=

equivalent miter bend radius

S

=

spacing of the miter cuts along the centerline

q

=

code-defined half-angle between adjacent miter cuts: q = a / 2N

Where:

a

=

total bend angle

N

=

number of cuts

When using B31.1, an additional parameter, B (length of miter segment at crotch), is examined for closely spaced miters. The following equation is used to compute B for evenly spaced miters:

B

=

S [ 1 - ro / Req ]

Where:

ro

=

outside radius of pipe cross-section