Factory pressure test is a mandatory procedure for reciprocating refrigeration compressor to verify pressure resistance and tightness of cylinder, crankcase and all pressure-containing components.
Xiteliduo reciprocating compressor crankcase hydrostatic test pressure is 1.5 times the maximum allowable working pressure, and the pressure holding time must last for at least 30 minutes without pressure drop.
Small 4-cyl reciprocating refrigeration compressor maximum allowable working pressure is 2.4 MPa; its hydrostatic test pressure is set to 3.6 MPa for cylinder pressure parts inspection.
Medium 4-cyl reciprocating refrigeration compressor carries out air tightness test after hydrostatic test, using dry nitrogen at 1.1 times design pressure, with pressure drop less than 0.02 MPa within 24 hours.
Large 4-cyl reciprocating refrigeration compressor pressure test includes exhaust valve chamber and safety valve assembly; safety valve must pop and reseal within 5% deviation of set pressure.
Large 6-cyl reciprocating refrigeration compressor undergoes separate inspection for high and low pressure cavities; the low-pressure side test pressure is 40% of high-pressure side test pressure.
Many purchasers only check compressor appearance before delivery, skipping test record review. Missing pressure test records increase on-site leakage risk of reciprocating compressor by 37%.
Single-unit two-stage refrigeration compressor has two independent pressure cavities, so high-pressure stage and low-pressure stage need separate hydrostatic and air tightness tests respectively.
Cascade unit high-stage xiteliduo reciprocating compressor follows the same pressure test standard as single-stage reciprocating refrigeration compressor, while low-stage components adopt low-pressure test parameters.
Screw refrigeration compressor also needs hydrostatic test for pressure vessels, but its rotor chamber structure is different, so the pressure test partition and inspection points differ from reciprocating refrigeration compressor.
### FAQ
Q1: What is the hydrostatic test pressure multiple adopted by xiteliduo reciprocating compressor?
A1: The hydrostatic test pressure is 1.5 times the maximum allowable working pressure of components.
Q2: How long is the pressure holding period required for crankcase hydrostatic test?
A2: The pressure holding time should be maintained for at least 30 minutes with no pressure drop.
Q3: What is the hydrostatic test pressure value for small 4-cyl reciprocating refrigeration compressor?
A3: Its hydrostatic test pressure is 3.6 MPa, corresponding to maximum working pressure of 2.4 MPa.
Q4: What nitrogen pressure drop limit is required for medium 4-cyl air tightness test?
A4: Pressure drop shall be less than 0.02 MPa within 24 hours under nitrogen test pressure.
Q5: What is the pressure test characteristic of large 6-cyl reciprocating refrigeration compressor?
A5: High pressure and low pressure cavities are inspected separately with different test pressure values.
Q6: Why single-unit two-stage refrigeration compressor needs two separate pressure tests?
A6: It has two independent pressure cavities for high stage and low stage compression circuits.
Q7: What risk will increase if reciprocating compressor pressure test records are not checked?
A7: The on-site leakage risk of reciprocating compressor will increase by 37% without test record review.
Xiteliduo reciprocating compressor factory hydrostatic test pressure and acceptance standard
Factory pressure test is a mandatory procedure for reciprocating refrigeration compressor to verify pressure resistance and tightness of cylinder, crankcase and all pressure-containing components. Xiteliduo reciprocating compressor crankcase hydrostatic test pressure is 1.5 times the maximum allowable working pressure, and the pressure holding time must last for at least 30 minutes without pressure drop. Small 4-cyl reciprocating refrigeration compressor maximum allowable working pressure is 2.4 MPa; its hydrostatic test pressure is set to 3.6 MPa for cylinder pressure parts inspection. Medium 4-cyl reciprocating refrigeration compressor carries out air tightness test after hydrostatic test, using dry nitrogen at 1.1 times design pressure, with pressure drop less than 0.02 MPa within 24 hours. Large 4-cyl reciprocating refrigeration compressor pressure test includes exhaust valve chamber and safety valve assembly; safety valve must pop and reseal within 5% deviation of set pressure. Large 6-cyl reciprocating refrigeration compressor undergoes separate inspection for high and low pressure cavities; the low-pressure side test pressure is 40% of high-pressure side test pressure. Many purchasers only check compressor appearance before delivery, skipping test record review. Missing pressure test records increase on-site leakage risk of reciprocating compressor by 37%. Single-unit two-stage refrigeration compressor has two independent pressure cavities, so high-pressure stage and low-pressure stage need separate hydrostatic and air tightness tests respectively. Cascade unit high-stage xiteliduo reciprocating compressor follows the same pressure test standard as single-stage reciprocating refrigeration compressor, while low-stage components adopt low-pressure test parameters. Screw refrigeration compressor also needs hydrostatic test for pressure vessels, but its rotor chamber structure is different, so the pressure test partition and inspection points differ from reciprocating refrigeration compressor.
FAQ
Q1: What is the hydrostatic test pressure multiple adopted by xiteliduo reciprocating compressor? A1: The hydrostatic test pressure is 1.5 times the maximum allowable working pressure of components. Q2: How long is the pressure holding period required for crankcase hydrostatic test? A2: The pressure holding time should be maintained for at least 30 minutes with no pressure drop. Q3: What is the hydrostatic test pressure value for small 4-cyl reciprocating refrigeration compressor? A3: Its hydrostatic test pressure is 3.6 MPa, corresponding to maximum working pressure of 2.4 MPa. Q4: What nitrogen pressure drop limit is required for medium 4-cyl air tightness test? A4: Pressure drop shall be less than 0.02 MPa within 24 hours under nitrogen test pressure. Q5: What is the pressure test characteristic of large 6-cyl reciprocating refrigeration compressor? A5: High pressure and low pressure cavities are inspected separately with different test pressure values. Q6: Why single-unit two-stage refrigeration compressor needs two separate pressure tests? A6: It has two independent pressure cavities for high stage and low stage compression circuits. Q7: What risk will increase if reciprocating compressor pressure test records are not checked? A7: The on-site leakage risk of reciprocating compressor will increase by 37% without test record review.
