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Baker Hughes
© 2020 Baker Hughes Company. All rights reserved.
V. Terminology for Safety Relief
Valves (SRV)
1. Accumulation
The pressure increase over the maximum allowable working
pressure of the vessel during discharge through the SRV,
expressed as a percentage of that pressure or in actual
pressure units.
2. Backpressure
The pressure on the discharge side of the SRV:
a. Built-up Backpressure - the pressure that develops at the
valve outlet, after the SRV has been opened, as a result
of flow.
b. Superimposed Backpressure - the pressure in the
discharge header before the SRV is opened.
3. Constant Backpressure
The superimposed backpressure that is constant with time.
4. Variable Backpressure
The superimposed backpressure that varies with time.
5. Blowdown
The difference between set pressure and re-seating
pressure of the SRV, expressed as a percentage of the set
pressure or in actual pressure units.
6.ColdDifferentialSetPressure
The pressure at which the valve is adjusted to open on the
test stand. This pressure
includes the corrections
for backpressure and/
or temperature service
conditions.
Differential Between Operating and Set Pressures Valves- in
installed process services will generally give best results if
the operating pressure does not exceed 90 percent of the
set pressure. However, on pump and compressor discharge
lines, the differential required between the operating and set
pressures may be greater because of pressure pulsations
coming from a reciprocating piston. The valve should be set
as far above the operating pressure as possible.
7. Lift
The actual travel of the disc away from the closed position
when a valve is relieving.
8. Maximum Allowable Working Pressure
The maximum gauge pressure permissible in a vessel
at a designated temperature. A vessel may not be
operated above this pressure, or its equivalent, at any
metal temperature other than that used in its design.
Consequently, for that metal temperature, it is the highest
pressure at which the primary pressure SRV is set to open.
IV. Warranty Information
Warranty Statement
(1)
:
Baker Hughes warrants that its products and work will meet all
applicable specifications and other specific product and work requirements (including those
of performance), if any, and will be free from defects in material and workmanship.
CAUTION:
Defective and nonconforming items must be held for Baker Hughes’s
inspection and returned to the manufacturer upon request.
Incorrect Selection or Misapplication of Products:
Baker Hughes cannot be responsible
for customers’ incorrect selection or misapplication of our products.
Unauthorized Repair work:
Baker Hughes. has not authorized any non-Baker Hughes-
affiliated repair companies, contractors or individuals to perform warranty repair service
on new products or field repaired products of its manufacture. Therefore, customers
contracting such repair services from unauthorized sources do so at their own risk.
Unauthorized Removal of Seals:
All new valves and valves repaired in the field by Baker
Hughes Field Service are sealed to assure the customer of our guarantee against defective
workmanship. Unauthorized removal and/or breakage of this seal will negate our warranty.
1.
Refer to Baker Hughes’s Standard Terms of Sale for complete details on warranty and limitation of
remedy and liability
.
Defective and
nonconforming items
must be inspected by
Baker Hughes
S E A L
E D
Removal and/or
breakage of seal will
negate our warranty.
Содержание Consolidated 19000 Series
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