Method for detecting cleanness of compressed air pipeline of offshore oil platform

A technology of compressed air tubes and offshore oil, which is applied in the direction of measuring devices, optical testing flaws/defects, particle suspension analysis, etc. It can solve undiscovered problems and achieve the effects of improving accuracy, reducing wear, and reducing sudden failures

Active Publication Date: 2015-01-28
NANTONG ZHENHUA HEAVY EQUIP MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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After examining the relevant documents, no technical solutions identical or similar to the present invention have been found

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  • Method for detecting cleanness of compressed air pipeline of offshore oil platform
  • Method for detecting cleanness of compressed air pipeline of offshore oil platform

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Experimental program
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Embodiment 1

[0025] like figure 1 As shown, the present invention discloses a method for detecting the cleanliness of compressed air pipelines on offshore oil platforms, which is used to measure the moisture, oil and solid particle size levels contained in the compressed air of the instrument holder on offshore oil platforms;

[0026] Specific steps are as follows:

[0027] S1. Preparation 101 before testing: First, the compressed gas is sprayed for about five minutes according to the theoretically calculated flow rate, and the valve is closed; then, the air sampling connection is performed as follows: figure 2 As shown, a gas sampling port is established at the end of the air pipeline. After the sampling port, a sampling air pipe 1, a stop valve 2, a flow regulating valve 3, a flow meter 4, and a detector 5 are connected in series. The sampling air pipe 1 is set with a curved The sampling air pipe of the head, and the elbow is less than 30°;

[0028] S2. Dew point detection 102: To det...

Embodiment 2

[0037] In this embodiment, on the basis of Embodiment 1, the dew point analyzer in step S2 is a portable dew point analyzer, the inlet pressure is adjusted to 80-200 kPa, and the flow rate is controlled within the range of 2-4 L / min.

[0038] In this embodiment, the dew point analyzer is a portable dew point analyzer, the inlet pressure is adjusted to 80-200kPa, and the flow rate is controlled within the range of 2-4L / min, which is convenient for detection and control, and at the same time improves the efficiency of dew point detection and the accuracy of detection ;

Embodiment 4

[0040] In this embodiment, on the basis of Embodiment 1 or Embodiment 2, in step S3, the area to be wiped each time is 0.1±0.01 square meters.

[0041] In this embodiment, white filter paper or lint-free cloth is used for wiping, and each wiping area is 0.1±0.01 square meters, which can effectively wipe off the oil stains in the wiping area and improve the accuracy of oil content detection.

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Abstract

The invention relates to a method for detecting the cleanness of a compressed air pipeline of an offshore oil platform. The method is used for measuring granularity grades of water, oil and solid in compressed air of an instrument of the offshore oil platform and specifically comprises the following steps: preparing before detecting, firstly, blowing off compressed air for about 5min according to a theoretical calculated flow rate, switching off a valve; secondly, performing air sampling connection; thirdly, performing dew point detection, detecting a water content of the compressed air of the instrument, firstly connecting a gas inlet of a dew point analyzer with an air pipeline sampling hole by adopting the dew point analyzer; then performing oil detection, firstly, dismantling a tail end connecting tool, opening a pipeline, performing white light detection, ultraviolet detection and wiping inspection; and finally detecting air particles, detecting particles of the compressed air, and performing three times of sampling by adopting an air particle detector. The method has the advantages that simplicity is realized, the concentrations of water, oil and solid particles in the compressed air can be accurately detected, and detection results meet the standard requirement of ISO8573.1.

Description

technical field [0001] The invention relates to compressed air pipelines, in particular to a method for detecting the cleanliness of compressed air pipelines on offshore oil platforms. Background technique [0002] The instrument compressed air system is one of the platform compressed air systems and is commonly used in the platform auxiliary system. Since the instrument compressed air mainly serves various precision instruments, the cleanliness of the compressed air for such precision parts has extremely strict requirements. It is necessary to accurately measure the concentration of moisture, oil and solid particles in compressed air. [0003] There are different standard systems for the cleanliness of instrument compressed air in the world, among which the ISO8573.1 standard is the most universally usable and pertinent. Compressed air that meets this quality standard will greatly reduce the wear and tear of power system accessories and prolong its service life. Long s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/66G01N21/94G01N21/64G01N15/06
Inventor 邱波
Owner NANTONG ZHENHUA HEAVY EQUIP MFG
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