Yokogawa digitalYEWFLO (DY) - Manual (Page 166)

<15. PED (PRESSURE EQUIPMENT DIRECTIVE)>
15-1
IM 01F06A00-01EN
15. PED (PRESSURE EQUIPMENT
DIRECTIVE)
This chapter is described further requirements and
notices concerning the PED (Pressure Equipment
Directive). The description in this chapter is prior to
other description in this User’s Manual.
(1) Technical Data
Pressure Equipment Directive:
Type of equipment: piping
Type of fl uid: liquid and gas
Group of fl uid: 1 and 2
Assessment: Module H
MODEL DN(mm)* PS(MPa)* PS·DN(MPa·mm) CATEGORY**
DY015 15 42 630 Article 3,***
Paragraph 3
DY025 25 42 1050 Article 3,***
Paragraph 3
DY040 40 42 1680 II
DY050 50 42 2100 II
DY080 80 42 3360 II
DY100 100 42 4200 II
DY150 150 42 6300 III
DY200 200 42 8400 III
DY250 250 42 10500 III
DY300 300 42 12600 III
DY400 400 25 10000 III
* PS: Maximum allowable pressure for Flow tube, DN: Nominal
size
** Refered to Table 6 coverd by ANNEX II of EC Directive on
Pressure Equipment Directive 97/23/EC
*** DY015 and DY025 are not regulated by PED.
(2) Installation
WARNING
• Please take measure to protect the
fl owmeters from forces caused by vibration
through piping.
(3) Operation
WARNING
• The temperature and pressure of fl uid should
be applied under the normal operating
condition.
• The ambient temperature should be applied
under the normal operating condition.
• Please pay attention to prevent the
excessive pressure like water hammer,
etc. When water hammer is to be occurred,
please take measures to prevent the
pressure from exceeding PS (maximum
allowable pressure) by setting the safety
valve, etc. at the system and the like.
• When external fi re is to be occurred, please
take safety measures at the device or
system not to infl uence the fl owmeters.
• Please pay attention not to be abrade the
metal pipe, when using the fl uid to abrade
the metal pipe such as slurry and sand are
contained.