Calculate \(\beta\) - local heat loss coefficient according to rule 11.3.3 of Minenergo Order 325. Local heat loss coefficient is used to increase normative heat loss of pipe by taking into account heat loss of fittings (shut-off valves, compensators and supports). This coefficient is applied mostly as a factor during the summation of heat losses of pipes in pipeline leveraging formula 14 of Minenergo Order 325.
Arguments
- laying
type of pipe laying depicting the position of pipe in space:
air,channel,room,tunnel,underground.
Type:
assert_subset.- d
internal diameter of pipe, [mm]. Type:
assert_double.
Value
Two possible values of \(\beta\): 1.2 or 1.15 depending on
pipe laying and its diameter. Type: assert_double.
See also
Other Minenergo:
m278hlair(),
m278hlcha(),
m278hlund(),
m278insdata,
m278inshcm(),
m278soildata,
m325nhl(),
m325nhldata,
m325testbench
Examples
library(pipenostics)
norms <- within(m325nhldata, {
beta <- m325beta(laying, as.double(diameter))
})
unique(norms$beta)
#> [1] 1.15 1.20
# [1] 1.15 1.20