The flow is turbulent downstream the globe valve, so some inline items or equipment require minimum distance to ensure that flow became laminat
Slug Flow is typical two phase flow where a wave is picked up periodically by the rapidly moving gas to form a frothy slug, which passes along the pipe at a greater velocity than the average liquid velocity.
Types of fluid service according to B31.3
(a) Category D Fluid Service: a fluid service in which all the following apply:
(1) the fluid handled is nonflammable, nontoxic, and not damaging to human tissues as defined in para.300.2;
(2) the design gage pressure does not exceed 1035 kPA (150 psi);
(3) the design temperature is from −29°C (−20°F) through 186°C (366°F).
(b) Category M Fluid Service: a fluid service in which the potential for personnel exposure is judged to be significant and in which a single exposure to a
very small quantity of a toxic fluid, caused by leakage, can produce serious irreversible harm to persons on breathing or bodily contact, even when prompt restorative
measures are taken
(c) High Pressure Fluid Service: a fluid service for which the owner specifies the use of Chapter IX for piping design and construction; see also para. K300
(d) Normal Fluid Service: a fluid service pertaining to most piping covered by this Code, i.e., not subject to the rules for Category D, Category M, or High
Pressure Fluid Service
