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CN-121994288-A - Centralized acceptance and detection platform system and method for BOP system instrument of PEM hydrogen production device

CN121994288ACN 121994288 ACN121994288 ACN 121994288ACN-121994288-A

Abstract

The invention relates to a centralized acceptance and detection platform system and method for BOP system instruments of a PEM hydrogen production device. The invention comprises a pressure supply unit, an oxygen buffer tank, a water circulation unit, a gas analysis unit and a dew point analysis unit, wherein the pressure supply unit comprises a gas pipeline, a pure hydrogen cylinder, a pure oxygen cylinder, a hydrogen pressure reducer and an oxygen pressure reducer which are correspondingly communicated with the pure hydrogen cylinder and the pure oxygen cylinder, the gas pipeline is respectively connected with the hydrogen pressure reducer and the oxygen pressure reducer, the oxygen buffer tank is provided with a plurality of groups of interfaces for installing an inserted water level gauge, a pressure detection instrument, a side-installed liquid level gauge and a temperature detection instrument, the oxygen buffer tank is internally provided with an electric heater, the water circulation unit comprises a circulating water pipeline and a variable-frequency water pump which are circularly communicated with the oxygen buffer tank, the circulating water pipeline is provided with a plurality of groups of interfaces for installing a conductivity detection instrument and a flow detection instrument, and the gas analysis unit comprises a hydrogen in oxygen analyzer, a trace oxygen analyzer and a dew point analyzer. The invention improves acceptance efficiency and reduces project risk and cost.

Inventors

  • LU MIAO
  • YU DEYE

Assignees

  • 无锡威孚高科技集团股份有限公司

Dates

Publication Date
20260508
Application Date
20260122

Claims (10)

  1. 1. A PEM hydrogen plant BOP system instrument centralized acceptance, detection platform system, comprising: A pressure supply unit for providing an adjustable gas pressure, the pressure supply unit comprising a gas pipe (21), a pure hydrogen cylinder (14), a pure oxygen cylinder (13) and a hydrogen pressure reducer (15-1) and an oxygen pressure reducer (15-2) which are correspondingly communicated with the pure hydrogen cylinder (14) and the pure oxygen cylinder (13), the gas pipe (21) being respectively connected with the hydrogen pressure reducer (15-1) and the oxygen pressure reducer (15-2); An oxygen buffer tank (8), wherein a plurality of groups of interfaces for installing an inserted water level gauge, a pressure detection instrument (5), a side-installed liquid level gauge (6) and a temperature detection instrument (7) are arranged on the oxygen buffer tank (8), an electric heater (9) for heating water in the tank is arranged inside the oxygen buffer tank (8), and a gas pipeline (21) is connected with the oxygen buffer tank (8); The water circulation unit is used for driving water to flow in the oxygen buffer tank (8), and comprises a circulating water pipeline (20) which is in circulation communication with the oxygen buffer tank (8) and a variable-frequency water pump (10) which is arranged on the circulating water pipeline (20), wherein a plurality of groups of interfaces for installing a conductivity detection instrument (11) and a flow detection instrument (12) are arranged on the circulating water pipeline (20); The gas analysis unit is used for carrying out on-line analysis and comparison on gas components and comprises a first detection pipeline (100) connected with the oxygen buffer tank (8) and a second detection pipeline (200) connected with the gas pipeline (21), wherein the first detection pipeline (100) is provided with an oxygen-in-hydrogen analyzer (3), and the second detection pipeline (200) is provided with a micro oxygen analyzer (18) and a dew point analyzer (19).
  2. 2. The centralized acceptance and detection platform system for the BOP system meters of the PEM hydrogen production device according to claim 1 is characterized in that the oxygen buffer tank (8) is of a vertical cylinder structure, the side-mounted liquid level meter (6) comprises a first liquid level meter (L1), a second liquid level meter (L2) and a third liquid level meter (L3) which are arranged on the tank side wall of the oxygen buffer tank (8) through hoses (24), the plug-in liquid level meter comprises a fourth liquid level meter (L4) and a fifth liquid level meter (L5) which are arranged on the upper part of the tank of the oxygen buffer tank (8), wherein the first liquid level meter (L1) is used as a standard meter for carrying out magnitude transmission and comparison, the second liquid level meter (L2) and the third liquid level meter (L3) are used as tested meters, and the fourth liquid level meter (L4) and the fifth liquid level meter (L5) are used as tested meters; The pressure detection instrument (5) comprises a first pressure instrument (P1), a second pressure instrument (P2), a third pressure instrument (P3) and a fourth pressure instrument (P4) which are arranged at the upper part of the tank body of the oxygen buffer tank (8), wherein the first pressure instrument (P1) is used as a standard instrument for carrying out magnitude transmission and comparison, the second pressure instrument (P2) and the third pressure instrument (P3) are tested instruments, and the fourth pressure instrument (P4) is used as a pressure transmitter of the system; The temperature detection instrument (7) comprises a first temperature instrument (T1), a second temperature instrument (T2) and a third temperature instrument (T3) which are arranged on the side wall of the tank body of the oxygen buffer tank (8), wherein the first temperature instrument (T1) is used as a standard instrument for carrying out magnitude transmission and comparison, and the second temperature instrument (T2) and the third temperature instrument (T3) are used as tested instruments.
  3. 3. The PEM hydrogen plant BOP system instrument centralized acceptance and detection platform system of claim 1, wherein: The circulating water pipeline (20) comprises a first circulating water pipe (201) and a second circulating water pipe (202), the oxygen buffer tank (8) is connected with the inlet end of the variable-frequency water pump (10) through the first circulating water pipe (201), and the outlet end of the variable-frequency water pump (10) is communicated with the oxygen buffer tank (8) through the second circulating water pipe (202); The conductivity detection instrument (11) comprises a first conductivity meter (C1), a second conductivity meter (C2) and a third conductivity meter (C3) which are arranged on the second circulating water pipe (202), wherein the first conductivity meter (C1) is used as a standard meter for magnitude transmission and comparison, and the second conductivity meter (C2) and the third conductivity meter (C3) are used as tested meters; The flow detection instrument (12) comprises a first flow meter (FL 1), a second flow meter (FL 2) and a third flow meter (FL 3) which are arranged on the second circulating water pipe (202), wherein the first flow meter (FL 1) is used as a standard instrument for carrying out magnitude transmission and comparison, and the second flow meter (FL 2) and the third flow meter (FL 3) are used as tested instruments; The first circulating water pipe (201) is provided with a switching valve (2-4), the first circulating water pipe (201) is also connected with a drainage pipeline (203), and the drainage pipeline (203) is provided with a drainage valve (2-5); An oxygen inlet tank automatic switch valve (2-3) is arranged on the second circulating water pipe (202).
  4. 4. The centralized acceptance and detection platform system for the BOP system meters of the PEM hydrogen production plant of claim 1, wherein the hydrogen-in-oxygen analyzer (3) comprises a standard hydrogen-in-oxygen analyzer (AOH 1) and a hydrogen-in-oxygen analyzer (3) to be tested which are arranged in parallel on the first detection pipeline (100); the oxygen pipeline is connected with an oxygen blow-down pipe (1), and the oxygen blow-down pipe (1) is provided with a hydrogen gas inlet automatic switch valve (2-1).
  5. 5. The centralized acceptance and detection platform system for the BOP system meters of the PEM hydrogen production device as claimed in claim 1, wherein the micro oxygen analyzer (18) comprises a standard micro oxygen analyzer (AO 1) and a micro oxygen analyzer to be detected (AO 2) which are arranged on the second detection pipeline (200) in parallel, and the dew point analyzer (19) comprises a standard hydrogen dew point analyzer (AW 1) and a hydrogen dew point analyzer to be detected (AW 2) which are arranged on the second detection pipeline (200) in series.
  6. 6. The centralized acceptance and detection platform system for the BOP system instrument of the PEM hydrogen production device according to claim 5, wherein the second detection pipeline (200) is connected with a hydrogen blow-down pipe (23), and a flame arrester (22) is arranged on the hydrogen blow-down pipe (23); An in-oxygen hydrogen analysis branch switching valve (2-9) is arranged between the second detection pipeline (200) and the gas pipeline (21).
  7. 7. The centralized acceptance and detection platform system for the BOP system meters of the PEM hydrogen production device as claimed in claim 1, wherein an oxygen buffer tank water inlet/supplementing valve (2-2) is arranged on the side wall of the oxygen buffer tank (8).
  8. 8. The centralized acceptance and detection platform system for the BOP system instrument of the PEM hydrogen production device according to claim 1, wherein a miniature hydrogen buffer tank (17) is arranged on the gas pipeline (21), a first branch (15 a) and a second branch (15 b) are arranged between the hydrogen pressure reducer (15-1) and the oxygen pressure reducer (15-2) corresponding to the gas pipeline (21), a hydrogen analysis branch switching valve (2-7) and a first check valve (16 c) are arranged on the first branch (15 a), a miniature hydrogen buffer tank air inlet valve (2-8) and a second check valve are arranged on the second branch (15 b), the miniature hydrogen buffer tank (17) is communicated with the miniature hydrogen buffer tank air inlet valve (2-8), and a third check valve and an oxygen buffer tank and miniature hydrogen buffer tank communication valve (2-6) are arranged between the miniature hydrogen buffer tank (17) and the hydrogen analysis branch switching valve (2-7).
  9. 9. A PEM hydrogen plant BOP system instrument centralized acceptance, detection platform system as in claim 8, wherein the mini-hydrogen buffer tank (17) volume is less than or equal to 0.2% of the oxygen buffer tank (8) volume.
  10. 10. A centralized acceptance and detection method for a PEM hydrogen production device BOP system instrument, which is characterized in that the centralized acceptance and detection platform system for the PEM hydrogen production device BOP system instrument is utilized according to any one of claims 1 to 9, and the method comprises the following steps: Step one, a liquid level meter detection step: The side-mounted liquid level meter (6) and the plug-in water level meter are detected in the oxygen buffer tank (8), wherein the first liquid level meter (L1) is a standard meter, the second liquid level meter (L2), the third liquid level meter (L3), the fourth liquid level meter (L4) and the fifth liquid level meter (L5) are tested meters, and the steps comprise: (1) Opening an oxygen buffer tank water inlet/supplementing valve (2-2), and filling water into the oxygen buffer tank (8) until the water level reaches the set liquid level of the first liquid level meter (L1); (2) Reading liquid level readings of a first liquid level meter (L1), a second liquid level meter (L2), a third liquid level meter (L3), a third liquid level meter and a fifth liquid level meter (L5), comparing the readings of the first liquid level meter (L1) with the readings of the second liquid level meter (L2), the readings of the third liquid level meter (L3), the readings of the fourth liquid level meter (L4) and the readings of the fifth liquid level meter (L5), and judging the working states and indication errors of the liquid level meters to be tested; (3) The water level in the oxygen buffer tank (8) is adjusted by continuously opening or closing the water inlet/water supplementing valve (2-2) of the oxygen buffer tank, readings of the liquid level meters are repeatedly compared at different liquid level points to finish liquid level detection with different measuring ranges and multiple points, and when the number of the liquid level meters to be detected is increased, the expansion detection is realized by adding interfaces on the oxygen buffer tank (8) and connecting more liquid level meters through hoses (24); step two, a temperature instrument detection step: Detecting a temperature detection instrument (7) in an oxygen buffer tank (8), wherein a first temperature instrument (T1) is a standard instrument, a second temperature instrument (T2) and a third temperature instrument (T3) are tested instruments, and the steps comprise: (1) After the detection of the liquid level meter is finished, an electric heater (9) is started to heat water in the oxygen buffer tank (8) so that the water temperature in the tank is increased to a preset target temperature, for example, about ℃, and then the electric heater (9) is turned off; (2) After the temperature in the oxygen buffer tank (8) is stable, respectively reading the temperature readings of the first temperature instrument (T1), the second temperature instrument (T2) and the third temperature instrument (T3), comparing the readings of the first temperature instrument (T1), the second temperature instrument (T2) and the third temperature instrument (T3), and judging the precision and the response performance of the tested temperature instrument; (3) The electric heater (9) is started again or naturally cooled as required, so that the water temperature in the oxygen buffer tank (8) is at different temperature points, the comparison process is repeated at a plurality of temperature points, multi-point temperature detection is realized, and when more temperature meters are required to be detected, a temperature interface is additionally arranged on the oxygen buffer tank (8) to be connected with an additional sensor; Step three, a conductivity meter detection step: Detecting the conductivity detection instrument (11) in the circulating water pipeline (20), wherein the first conductivity instrument (C1) is a standard instrument, the second conductivity instrument (C2) and the third conductivity instrument (C3) are tested instruments, and the steps comprise: (1) Opening a switching valve (2-4) to enable water in the oxygen buffer tank (8) to enter a circulating water pipeline (20) through a first circulating water pipe (201); (2) Under the drive of a variable-frequency water pump (10), water circularly flows between an oxygen buffer tank (8) and a circulating water pipeline (20), and the first conductivity meter (C1), the second conductivity meter (C2) and the third conductivity meter (C3) measure the conductivity of the water body on line; (3) Comparing the measurement results of the first conductivity meter (C1), the second conductivity meter (C2) and the third conductivity meter (C3) under the same working condition, evaluating the accuracy and consistency of the tested conductivity meter, and expanding more conductivity detection points by adding an interface on a circulating water pipeline (20); Fourth, the flow meter detection step: Detecting a flow detection instrument (12) in a circulating water pipeline (20), wherein a first flow meter (FL 1) is a standard instrument, a second flow meter (FL 2) and a third flow meter (FL 3) are tested instruments, and the method comprises the following steps: (1) Starting a variable-frequency water pump (10) to enable water to circulate between a circulating water pipeline (20) and an oxygen buffer tank (8); (2) The water flow rate is changed by adjusting the working frequency of the variable-frequency water pump (10), so that the flow covers the range of each flowmeter to be measured; (3) Under different flow working conditions, respectively reading flow readings of a first flow meter (FL 1), a second flow meter (FL 2) and a third flow meter (FL 3), comparing the readings of the first flow meter (FL 1), the second flow meter (FL 2) and the third flow meter (FL 3), verifying the accuracy and the linearity of the tested flow meter, and realizing one-stop test of more flow meters by adding an interface on a circulating water pipeline (20); step five, a pressure instrument detection step: Detecting a pressure detection instrument (5) in an oxygen buffer tank (8), wherein a first pressure instrument (P1) is a standard instrument, a second pressure instrument (P2) and a third pressure instrument (P3) are tested instruments, a fourth pressure instrument (P4) is a system pressure transmitter, and the method comprises the following steps: (1) Closing a hydrogen gas inlet automatic switching valve (2-1), an oxygen buffer tank water inlet/supplementing valve (2-2), an oxygen gas inlet automatic switching valve (2-3), a switching valve (2-4) and a communication valve (2-6) between the oxygen buffer tank and the miniature hydrogen buffer tank, opening the oxygen gas inlet automatic switching valve (2-3), and adjusting an oxygen pressure reducer (15-2); (2) Slowly filling oxygen into the oxygen buffer tank (8) from the pure oxygen bottle (13) through the gas pipeline (21) to enable the pressure in the oxygen buffer tank (8) to rise to a preset target pressure value; (3) After the pressure is stable, simultaneously reading pressure readings of a first pressure instrument (P1) and a second pressure instrument (P2), a third pressure instrument (P3) and a fourth pressure instrument (P4), comparing the readings of the first pressure instrument (P1) and the second pressure instrument (P2) and the third pressure instrument (P3), checking the deviation of the tested pressure instruments, and expanding a pressure test point by additionally arranging a pressure interface on an oxygen buffer tank (8); Step six, detecting the hydrogen dew point analyzer (19) and the micro oxygen analyzer (18): Detecting a dew point analyzer (19) and a micro oxygen analyzer (18) on a second detection pipeline (200), wherein a standard hydrogen dew point analyzer (AW 1) and a standard micro oxygen analyzer (AO 1) are standard instruments, a hydrogen dew point analyzer (AW 2) to be detected and a micro oxygen analyzer (AO 2) to be detected are tested instruments, and the method comprises the following steps: (1) Opening a micro hydrogen buffer tank air inlet valve (2-8) and an in-oxygen hydrogen analysis branch switching valve (2-9), closing an oxygen buffer tank and micro hydrogen buffer tank communication valve (2-6), and slightly opening a hydrogen pressure reducer (15-1) to enable hydrogen to enter a second detection pipeline (200) from a pure hydrogen bottle (14) through a gas pipeline (21) and a micro hydrogen buffer tank (17) communicated with the second detection pipeline, and continuously introducing hydrogen into pipelines connected with a dew point analyzer (19) and a micro oxygen analyzer (18); (2) Continuously introducing hydrogen for a preset time to remove air in the second detection pipeline (200), so that the pipeline, the dew point analyzer (19) and the micro oxygen analyzer (18) are basically filled with hydrogen; (3) After the hydrogen working condition is stable, the standard hydrogen dew point analyzer (AW 1) and the hydrogen dew point analyzer (AW 2) to be tested output dew point measurement values at the same time, the standard micro oxygen analyzer (AO 1) and the micro oxygen analyzer (AO 2) to be tested output micro oxygen concentration measurement values at the same time, and the measurement results of the standard hydrogen dew point analyzer (AW 1) and the hydrogen dew point analyzer (AW 2) to be tested, the standard micro oxygen analyzer (AO 1) and the micro oxygen analyzer (AO 2) to be tested are compared, the precision of the tested analyzer is confirmed, and the hydrogen in oxygen analysis branch switching valves (2-9) are closed on the premise that the hydrogen working condition is still maintained in the second detection pipeline (200) is ensured, so that the detection of the hydrogen analyzer is completed; step seven, detecting the hydrogen in oxygen analyzer (3): detecting the hydrogen in oxygen analyzer (3) on a first detection pipeline (100), wherein the standard hydrogen in oxygen analyzer (AOH 1) is a standard instrument, the hydrogen in oxygen analyzer (3) to be detected is a tested instrument, and the steps comprise: (1) After the pressure instrument detection and the hydrogen analyzer detection are completed, the oxygen buffer tank (8) is kept with preset oxygen pressure, the first detection pipeline (100) is communicated with the oxygen buffer tank (8), and the miniature hydrogen buffer tank (17) is communicated with the gas pipeline (21); (2) Opening an air inlet valve (2-8) of the micro hydrogen buffer tank, closing a branch switching valve (2-9) of the hydrogen analysis in oxygen, and filling hydrogen into the micro hydrogen buffer tank (17) by adjusting a hydrogen pressure reducer (15-1) to enable the pressure of the hydrogen in the micro hydrogen buffer tank (17) to be 1.5-2 times of the pressure of the oxygen in the oxygen buffer tank (8); (3) Then closing the hydrogen analysis branch switching valve (2-7), opening the communication valve (2-6) between the oxygen buffer tank and the micro hydrogen buffer tank, and injecting the hydrogen in the micro hydrogen buffer tank (17) into the oxygen buffer tank (8) through the gas pipeline (21) until the hydrogen pressure P4 in the micro hydrogen buffer tank (17) is equal to the oxygen pressure P1 in the oxygen buffer tank (8), and then closing the communication valve (2-6) between the oxygen buffer tank and the micro hydrogen buffer tank; (4) The relation that the volume V1 of the miniature hydrogen buffer tank (17) and the volume V2 of the oxygen buffer tank (8) meet V1 less than or equal to 0.2 percent V2 is utilized, so that the volume fraction of hydrogen in oxygen in the oxygen buffer tank (8) is lower than the safety range of the explosion lower limit of the hydrogen in the oxygen, and the detection range requirements of a standard hydrogen in oxygen analyzer (AOH 1) and a hydrogen in oxygen analyzer (3) to be detected are met; (5) Under the condition of stable mixed gas, the standard hydrogen in oxygen analyzer (AOH 1) and the hydrogen in oxygen analyzer (3) to be tested are measured simultaneously, hydrogen content readings output by the standard hydrogen in oxygen analyzer and the hydrogen in oxygen analyzer are compared, and the performance of the hydrogen in oxygen analyzer (3) to be tested is verified; step eight, a system shutdown step: after all instrument detection is completed, the whole platform system is restored to a safe initial state, and the method comprises the following steps: (1) Sequentially closing the hydrogen pressure reducer (15-1) and the oxygen pressure reducer (15-2), and cutting off air sources from the pure hydrogen cylinder (14) and the pure oxygen cylinder (13); (2) The automatic switching valve (2-1) for hydrogen gas inlet, the switching valve (2-7) for hydrogen gas analysis branch, the air inlet valve (2-8) of the miniature hydrogen buffer tank, the switching valve (2-9) for hydrogen analysis branch in oxygen, the switching valve (2-4) and the water outlet valve (2-5) are sequentially opened according to the requirement, residual hydrogen, oxygen and mixed gas in the system are discharged into the atmosphere through the oxygen blow-down pipe (1), the hydrogen blow-down pipe (23) and the circulating water pipeline (20), and water in the oxygen buffer tank (8) and the circulating water pipeline (20) is exhausted; (3) After confirming that the oxygen buffer tank (8), the circulating water pipeline (20) and the gas pipeline (21) are free of residual gas and liquid, resetting each automatic switching valve (2), check valve and related instruments to finish system shutdown and safe recovery.

Description

Centralized acceptance and detection platform system and method for BOP system instrument of PEM hydrogen production device Technical Field The invention relates to the technical field of PEM hydrogen production, in particular to a centralized acceptance and detection platform system and method for a Proton Exchange Membrane (PEM) hydrogen production device auxiliary system (BOP) system instrument. Background In PEM hydrogen plant BOP systems, the reliability and accuracy of the meter directly relate to the safety, stability and production efficiency of the whole plant. Pressure, temperature, flow, physical properties, liquid level, analysis, etc. are key components of BOP systems (separation cooling systems, hydrogen purification systems, etc.) for process monitoring and control. Currently, the conventional method commonly adopted in industry for checking and accepting the arrival and initially detecting the outsourcing instrument has the following typical flow and inherent defects: 1. Checking the arrival and unpacking: only the most basic static acceptance of appearance check, model check, file inventory, etc. can be performed. No verification of the internal performance, metering characteristics of the meter can be made. 2. Lack of application specific integrated devices: When performance testing is performed on different types of meters, various discrete and independent standard devices (such as a pressure calibrator and a multimeter for a pressure transmitter, a thermal calibration furnace for platinum resistance, a standard resistance box and standard liquid for a conductivity meter and the like) are required to be relied on. The inspector needs to be familiar with wiring methods, testing principles and operation flows of different meters, and frequently replaces testing equipment and tools. The whole process is time-consuming and labor-consuming, has low efficiency, and is difficult to cope with the centralized acceptance requirement of the arrival of a large number of meters. 3. Laboratory inspection: For a few critical meters, it is sent to a metering laboratory or third party certification authority within the company. The mode is long in period and high in cost, and the transportation damage risk exists in the inspection process. More importantly, it is not possible to cover all of the arrival meters, especially the vast number of universal meters. 4. Debugging after field installation: The first performance verification of most meters is done through loop testing and field commissioning after installation on pipes and equipment. This is a "post-verification" and once the meter is found to have factory defects or transport damage, it is very costly to replace, including downtime, disassembly, possible product leakage or risk of safety accidents, and severely delays the construction period. 5. The prepositioning of quality risk is forced to increase purchasing cost: just because the traditional method can not carry out effective and rapid full inspection or spot inspection on the instrument before the instrument is installed, the instrument with potential quality defects or hidden transportation damage can not be screened out in time. To combat this uncertainty, and ensure project time, BOP manufacturing units typically take a passive and conservative strategy of overstocking standby meters. This directly increases the procurement costs, warehousing and management costs of the project. Disclosure of Invention Therefore, the invention provides a centralized acceptance and detection platform system and method for a BOP system instrument of a PEM hydrogen production device, which aims to integrate various detection functions and realize quick and batch primary screening of the instruments such as pressure, temperature, liquid level, flow and the like, thereby improving acceptance efficiency, ensuring quality before installation, reducing excessive purchasing and reducing project risks and cost. In order to solve the technical problems, the invention provides a centralized acceptance and detection platform system for a BOP system instrument of a PEM hydrogen production device, which comprises the following components: The pressure supply unit is used for providing adjustable gas pressure and comprises a gas pipeline, a pure hydrogen cylinder, a pure oxygen cylinder, and a hydrogen pressure reducer and an oxygen pressure reducer which are correspondingly communicated with the pure hydrogen cylinder and the pure oxygen cylinder, wherein the gas pipeline is respectively connected with the hydrogen pressure reducer and the oxygen pressure reducer; the oxygen buffer tank is provided with a plurality of groups of interfaces for installing an inserted water level gauge, a pressure detection instrument, a side-installed liquid level gauge and a temperature detection instrument, an electric heater for heating water in the tank is arranged in the oxygen buffer tank, and the gas pipeline is connected with the o