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JB/T 9076-2016 PDF in English

JB/T 9076-2016 (JB/T9076-2016, JBT 9076-2016, JBT9076-2016)
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Standards related to: JB/T 9076-2016

JB/T 9076-2016: PDF in English (JBT 9076-2016)

JB/T 9076-2016
ICS 23.080
J 76
Record number: 53647-2016
Replacing JB/T 9076-1999
Reciprocating cryogenic liquid pumps - Specification
Issued by: Ministry of Industry and Information Technology of the People's
Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Technical requirements ... 5
3.1 General ... 5
3.2 Performance requirements ... 5
3.3 Materials ... 7
3.4 Non-destructive testing ... 8
4 Test methods and inspection rules ... 8
4.1 Test methods ... 8
4.2 Inspection rules ... 10
5 Nameplate, packaging, transportation and storage ... 11
6 Scope of supply ... 12
Reciprocating cryogenic liquid pumps - Specification
1 Scope
This Standard specifies the technical requirements, test methods, inspection rules,
nameplate, packaging, transportation, storage and scope of supply of reciprocating
cryogenic liquid pumps for air separation plant (hereinafter referred to as reciprocating
This Standard applies to reciprocating pumps whose conveying medium is liquid
oxygen, liquid nitrogen, liquid argon or other non-corrosive liquefied gases, design
temperature is -196 °C ~ -101 °C, and discharge pressure is not higher than 36 MPa.
Note: The pressure in this Standard is gauge pressure unless otherwise specified.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the dated version applies to this document. For
undated references, the latest edition (including all amendments) applies to this
GB 150 (all parts), Pressure vessels
GB/T 1220, Stainless steel bars
GB/T 5231, Designation and chemical composition of wrought copper and copper
GB/T 6075 (all parts), Mechanical vibration - Evaluation of machine vibration by
measurements on non-rotating parts
GB/T 9069, Determination of sound power level for noise emitted by reciprocating
pump - Engineering method
JB/T 6896, Surface clearness of air separation plant
NB/T 47013 (all parts), Nondestructive testing of pressure equipment
ASTM B865, Standard Specification for Precipitation Hardening Nickel-Copper-
Aluminum Alloy (UNS N05500) Bar, Rod, Wire, Forgings, and Forging Stock
3 Technical requirements
3.1 General
3.1.1 The reciprocating pump shall comply with the provisions of this Standard, and
shall be manufactured according to the drawings and technical documents approved by
the prescribed procedures, or as required by the contract.
3.1.2 Motors and electrical devices shall meet the regional level requirements stipulated
in the contract.
3.1.3 The connection between the pump head of the reciprocating pump and the pipeline,
and the connection between the base and the foundation shall be able to avoid
deformation affecting the use due to changes in temperature and pressure.
3.1.4 During the operation of the reciprocating pump and during the termination of
pumping, the cold end part and the transmission case shall be polluted by moisture, dust
and foreign matter as little as possible.
3.1.5 All pipeline installations and support settings, etc., shall be able to withstand the
total load of temperature stress caused by repeated changes in medium temperature and
additional stress caused by connecting pipelines for a long time.
3.1.6 In the structure of the reciprocating pump, there shall be no dead angles that are
prone to air blockage, and the outlet of the reciprocating pump shall not be arranged
3.1.7 Spare parts and consumable parts of reciprocating pumps shall have good
interchangeability and shall meet the requirements of this Standard.
3.2 Performance requirements
3.2.1 The reciprocating pump shall work normally according to the performance
parameters specified in the drawings. Under rated operating conditions, the
performance indicators shall meet the requirements in Table 1.
3.2.2 When liquid compressibility is considered, the volumetric efficiency shall be
reduced, and the user shall provide the compressibility data of the medium.
3.2.3 The reciprocating pump shall work normally and operate reliably when the
discharge pressure deviation increases to 105% of the rated discharge pressure value.
3.3.2 The calculated stress of the material of the pressure-bearing parts of the
reciprocating pump shall not exceed the maximum allowable stress at the maximum
operating temperature of the material.
3.4 Non-destructive testing
Non-destructive testing shall comply with the provisions of NB/T 47013. Materials for
forged pressure-bearing parts (including shafts) shall be subjected to ultrasonic testing,
which shall not be lower than the requirements of level II in NB/T 47013.3. The
pressure-bearing butt welds shall be subjected to radiographic testing, which shall not
be lower than the requirements of level II in NB/T 47013.2; the fillet welds shall be
subjected to penetrant testing, which shall not be lower than the requirements of level
II in NB/T 47013.5.
4 Test methods and inspection rules
4.1 Test methods
4.1.1 Water is prohibited in the performance tests of reciprocating pumps, and cryogenic
media such as liquid nitrogen shall be used for performance tests; liquid oxygen should
not be used as the test medium.
4.1.2 Flow measurement:
Use the flow meter method, inflation bottle measurement method or other equivalent
methods, such as the gas flow meter detection and conversion method after the on-site
vaporizer. Test flow deviation shall meet the requirements of 3.2.1. The specific method
is as follows:
a) Flow meter method
1) Applicable to the performance test device equipped with a flow meter.
2) After the reciprocating pump is in normal operation and reaches the set speed,
collect the flow data, and take the average value of the three sets of data as the
actually measured flow of the reciprocating pump.
b) Inflation bottle measurement method: After the discharge pressure of the
reciprocating pump is stabilized, completely vaporize the cryogenic liquid in the
vaporizer, and fill it into the metering container; record the inflation time t, and
measure the pressure p1, p2 and temperature T1, T2 in the container before and
after inflation; calculate the flow rate of the reciprocating pump according to
Formula (1).
q – flow rate of the pump, in liters per hour (L/h):
V – capacity of the inflation bottle, in liters (L);
t – total time of measurement, in seconds (s):
ϕ – coefficient, the volume occupied by each liter of cryogenic liquid vaporized into
gas at 0 °C and 0.101 325 MPa (absolute), in cubic meters (m3);
p2 – final pressure of the inflation bottle, in megapascals (MPa);
T2 – final temperature of the inflation bottle, in Kelvins (K):
P1 – initial pressure of the inflation bottle, in megapascals (MPa);
T1 – initial temperature of the inflation bottle, in Kelvins (K).
4.1.3 Outlet pressure test:
After the reciprocating pump works normally and runs to the specified speed, close the
outlet valve, observe the pressure gauge of the outlet pipeline of the reciprocating pump,
and test whether it reaches the specified outlet pressure value and runs stably. Be careful
not to shut down the valve.
4.1.4 When the reciprocating pump reaches the specified outlet pressure and flow rate,
use a dynamometer or the current and voltage calculation method to test the shaft power.
4.1.5 Required net positive suction head test for reciprocating pumps:
When the reciprocating pump reaches the specified rated speed and rated pressure,
while maintaining the differential pressure not lower than the rated differential pressure,
gradually reduce the suction pressure of the pump until the flow rate is 5% ~ 10% lower
than the normal flow rate; test at not less than 5 points. When the reciprocating pump
is close to cavitation, the interval between test points shall be appropriately reduced. At
each suction pressure test point, the values of medium temperature, flow rate of
hours. When the factory does not have low temperature operation conditions, it is
allowed to be carried out at the user’s site. Type inspection items are as follows:
1) performance (flow rate, discharge pressure, suction pressure, shaft power,
number of reciprocations, net positive suction head of the pump, etc.)
2) vibration measurement;
3) noise measurement;
4) wear measurement of piston ring and guide ring.
4.2.3 The ex-factory inspection rules are as follows:
a) Each reciprocating pump shall be subjected to the ex-factory inspection;
b) Conduct routine inspections according to product drawings and technical
c) The transmission part of the reciprocating pump must be subjected to a no-load
loading test for 4 hours, requiring stable operation and no abnormal sound;
d) The cryogenic performance test of the reciprocating pump is carried out by
sampling one out of every 4 (or at least 4) machines. Run the reciprocating pump
with cryogenic medium for 2 h ~ 4 h, and measure the flow rate, discharge
pressure, suction pressure, number of reciprocations, etc. at the same time; do a
5% overpressure test, and there shall be no abnormal phenomenon after running
for 10 minutes.
5 Nameplate, packaging, transportation and storage
5.1 Each reciprocating pump shall have the product nameplate fixed at an obvious
position. The nameplate shall indicate the following contents:
a) model and name.
b) name of the manufacturer.
c) working medium.
d) design temperature.
e) performance parameters:
-- flow, in liters per hour (L/h);
-- suction pressure, in megapascals (MPa):
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.