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Nanjing Jinling Environmental Testing Instrument Equipment Co., Ltd

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SSC anti hydrogen sulfide stress corrosion test device

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

The SSC anti hydrogen sulfide stress corrosion test device has two standard configurations, with one designed inside a gas cylinder cabinet and the other designed to be linked to a touch screen in a ventilated area. Once a leak is detected, the equipment immediately stops working and triggers an alarm. The leakage alarm value is adjustable from 0.1-1ppm

Product Details

SSC anti hydrogen sulfide stress corrosion test deviceBasic Parameters
specification name	H₂S-2000
Reactor capacity	2300 ml
external dimensions	Φ140*150 mm
All steel fume hood (anti-corrosion)	85012002350 mm
Gas cylinder cabinet（4ps）	12004001100 mm
Filter sedimentation tank	800800800 mm
Spray tower (optional)	Φ500*1000mm
Gas emission outlet	Φ40 mm
performance
2.1.Test environment conditions	The ambient temperature is+25℃, relative humidity ≤85%
2.2.test method	GB/T 8650-2015 Evaluation Method for Hydrogen Induced Cracking Resistance of Pipeline Steel and Pressure Vessel Steel GB/T20972The Oil and Gas Industry Materials used in environments containing hydrogen sulfide in oil and gas extraction
2.3.Temperature range of the test chamber	24℃±3℃
2.4.Standard quantitative pump flow range	Nitrogen:0300Ml/min accuracy 0.1ml hydrogen sulfide:0-300ml/minprecision0.1ml
2.5.Leakage concentration probe detection range	0-10ppmThere are two standard configurations, one designed inside the gas cylinder cabinet and the other designed to be linked with the touch screen in the ventilation area. Once a leak is detected, the equipment will immediately stop working and trigger an alarm. The leakage alarm value0.1-1ppm adjustable)
2.6.Concentration control method	Accurate import of quality and traffic
2.7.Gas filtration method	Bubble neutralization filtration+Activated carbon adsorption treatment
3. Structural Introduction
3.1.material	Reaction kettle：Made of transparent acrylic, pressure resistant0.2MPa； Link pipeline：Teflon material； fume hood：Steel plate spraying (anti-corrosion coating) trap：glass； beaker：glass； Waste disposal device:Transparent acrylic board
3.2.Location of thermometer	located inNear the equipment, the temperature near the reaction kettle can be continuously recorded
3.3.seal	Fluororubber sealing strip sealing, screw connection；
3.4.intake method	Steel cylinder type
3.5.Exhaust gas interface	φ40mm
3.6.Composition of exhaust gas	Weak alkaline high humidity gas, harmless to the five toxins,conform toGB16297-1996Industrial gas emission standards
3.7.Device Type	The inside of the reaction vessel is under positive pressure, with a pressure<0.1MPa(Optional anti-corrosion pressure detection system, once overpressure occurs, the equipment will shut down and emit a buzzing sound).
3.8.Leakage alarm device	becauseThe gas used in the experiment is hydrogen sulfide, which is toxic, so this equipment is designed with two setsLeakage alarm deviceOne of themLocated inside the gas safety cabinet,Another design is inside the fume hoodOnce there is a leak, an automatic sound and light alarm will be triggered, and the indoor air filter will be activated. The fan inside the air filter will start to extract air from the inside of the steel cylinder cabinet for replacement, and filter it before discharge until the monitoring probe cannot detect any corrosive gas inside. The machine will shut down to ensure the safety of the user.
3.9.Gas Cabinet	4PSGas cylinder cabinet, can be placed4bottle8LThe gas cylinder
3.10.waste discharge device	A waste discharge device is designed at the end of the internal process, mainly for configuring alkaline solution. The gas is bubbled by the alkaline solution and then adsorbed by activated carbon before being discharged into the factory's waste gas pipeline (if there is no waste gas pipeline in the factory, an additional waste gas treatment tower can be installed, and after three-stage filtration, it can be discharged outdoors)
3.11.intake method	The air intake of this device adopts the method of mass flow introduction, as shown in the attached test process for details
3.12.Control Panel	Programmable corrosion gas specific controller, power switch, paperless recorder
SSC anti hydrogen sulfide stress corrosion test deviceCorrosion gas controller	The temperature and humidity control instruments are imported7.0-inch color touch screen programmable controller, with a large screen, easy operation, and easy program editing,beltR232communication port； 1. Accuracy:0.1 ℃ (display range); 2. Resolution:±0.1℃； 3. Temperature sensor:PT100 platinum resistance thermometer; 4. Control mode: thermal balance temperature and humidity control mode; 5. Temperature and humidity control adoptsCoordination control of the P.I.D+S.S.R system on the same channel; 6. It has the function of automatic calculation, which can immediately correct the temperature and humidity change conditions, making temperature and humidity control more accurate and stable; 7. The controller operation interface is available in both Chinese and English, and the real-time operation curve can be displayed on the screen; 8. have10 sets of programs, 100 segments per set, with a capacity to cycle 999 steps per segment, and a maximum time setting of 99 hours and 59 minutes per segment; 9. After inputting the data and experimental conditions, the controller has a screen lock function to avoid manual touch and shutdown; 10. haveRS-232 or RS-485 communication interface, which can be programmed on a computer to monitor the testing process and perform functions such as automatic power on/off, curve printing, and data processing; 11. The controller has an automatic screen saver function, which better protects the LCD screen (prolonging its lifespan) during long-term operation; 12. Accurate and stable control, long-term operation without drift; 13. 1s ~999hThemTheSThe spray stop time can be set arbitrarily; 14. The program or fixed value test can be set arbitrarily, and can be based onRequest the program to conduct a cyclic test； 15. instrument displayexperimentTemperature, andthree-channelgas flow rate（Each channel contains nitrogen flow and hydrogen sulfide flow）； 16. All functions can be set and operated on this screen; 17. In operation or setting, if an error occurs, a warning signal will be provided; 19. The main control components are all Schneider electrical components from France, ensuring the reliable performance of the equipment.
3.19 Protection System	1Gas leakage alarm handling; 2Hazardous gas treatment and protection system; 3Exhaust fan overcurrent protection;
4. transportation	The test box is of integral type and can be transported as a whole
5. Terms of Use	The user guarantees the following conditions
environment/Venuecondition	ltemperature5℃～30 ℃ relative humidity: ≤85% atmospheric pressure86kPa～106kP lThe ground is flat, well ventilated, and free of flammable, explosive, corrosive gases and dust lThere is no strong electromagnetic radiation source nearby lThere is a drainage floor drain near the equipment (distance from the refrigeration unit)Within 2 meters lGround bearing capacity of the venue: not less than200kg/m2 lLeave appropriate maintenance space around the equipment lThe airflow around the equipment is unobstructed, without high concentration dust, corrosive or flammable gases lSuggest reserving independent storage space
Power supply conditions	lVoltage:AC220V/50HZ lAllowable voltage fluctuation range:AC（1±10%） lAllowable fluctuation range of frequency:（1±1%）50Hz lThe grounding resistance of the protective grounding wire is less than4Ω； TN-S power supply or TT power supply lRequire users to configure corresponding capacity air or power switches for the equipment at the installation site, lAnd this switch must be independent and specifically designed for use with this device lTotal maximum power:1000W
6. Precautions	1. Due to the strong adsorption of hydrogen sulfide, it is necessary to wear a specialized gas mask and rubber gloves when operating this equipment; 2. Before entering the laboratory each time, it is necessary to observe whether the three color lights that come with the equipment are in green state 3. Nitrogen pressure holding test must be conducted during each test before conducting deoxygenation and hydrogen sulfide tests
The equipment mainly consists of the following parts: 1 Reaction kettleThree sets (standard configuration) 2 trafficThree sets of experimental equipment (standard configuration) 3 Leakage alarm deviceTwo sets (standard configuration) 4 One anti-corrosion all steel fume hood (standard configuration) 5 Two traps (standard configuration) 6 Two beakers (standard configuration) 7 Exhaust gas filtration device (standard configuration) 8 8L hydrogen sulfide gas bottle (standard configuration, equipped with dedicated pressure reducing valve) 9 8L nitrogen gas bottle (standard configuration, equipped with a dedicated pressure reducing valve) 10 *Filter consumables (500g two bottles, 2kg large particle activated carbon) 11 sprayFilter tower（optional） 12 Electronic scale（optional） 13 Gas（Optional, except for equipment configuration） 14 backupPressure reducing valve (optional) 15 Alarm (optional, in addition to standard)**

Attachment: Experimental Procedure:

10. programProcedure

10.1 Sample soaking

10.1.1 The specimen should be placed vertically in the test container with a wide surface, and separated from the container and between specimens by glass or other non-metallic rods with a minimum diameter of 6mm. The longitudinal axes of the sample can be perpendicular or parallel to each other, as shown in Figure 10.

The ratio of the sample solution volume to the sample surface area should not be less than 3mL/cm²As long as the specified ratio is met and the samples are immersed in the solution and not in contact with each other, as many samples as possible can be placed in one container and exposed simultaneously.

10.1.3 The solution is prepared in a separately sealed container and before introducing the nitrogen purged test container,expel air

10.2 Pure nitrogen and hydrogen sulfide gases should be introduced from near the bottom of the test vessel，Perform deoxygenation and hydrogen sulfide testing.

10.3 Measurement of pH Value

10.3.1 If solution A is used, the pH value of the solution should be measured immediately after saturation with hydrogen sulfide at the beginning of the experiment, and its value should be within the range of 2.7-3.3. If solution B is used, the pH value of the solution should be measured immediately after hydrogen sulfide saturation, and its value should be within the range of 4.8~5.4.

After the experiment is completed, the pH value of the solution should be measured and recorded. For solution A, the effective pH value of the experiment should not exceed 4.0; For solution B, the effective pH value for the experiment should be within the range of 4.8-5.4.

10.4 Test duration

The duration of the experiment should be96 hours. The test time should be calculated from the initial 60 minutes of hydrogen sulfide gas filling and the minimum concentration of hydrogen sulfide gas being 2300mg/L (10.2.3).

The temperature of the test solution should be maintained at 25 ℃± 3 ℃.

11. evaluationEvaluation

After the immersion test, each sample should be cleaned to remove surface products and deposits. The soaked sample can be cleaned with a cleaning agent and wire brush or lightly sandblasted. The soaked sample is not allowed to be cleaned by acid washing or any other cleaning method that may promote hydrogen absorption.

11.2 Cut the test surface of the cleaned sample according to the type requirements.

11.3 If necessary, each section should be etched and metallographic polished to distinguish cracks from small inclusions, delamination, scratches, or other discontinuous defects. But it can only be slightly etched, heavy etching may obscure small cracks. It is very important to use metallographic preparation method to clean the surface of the sample in the experiment, otherwise some important cracks will not be visible. Before the final metallographic polishing, all surfaces that need to be inspected should undergo wet magnetic particle inspection or macroscopic etching. Other sampling methods can also be used, but it is required to prove that the method can clearly display the existing cracks after the final polishing, and the process of the method should be described in detail.

11.4 Cracks should be measured as shown in Figure 11. When measuring the length and thickness of cracks, several cracks with a distribution distance less than 0.5mm should be considered as one crack. When measuring cracks in curved or circular sections, especially in full-size pipe tests, the curvature of the section should be taken into account. Except for cracks within 1mm on the inner and outer surfaces of the specimen, all cracks that can be identified at a magnification of 100 times should be included (in order to distinguish small cracks, inclusions, surface corrosion resistance, or other discontinuous defects on the cross-section, the cross-section can be inspected at higher magnifications).

11.5 The crack sensitivity rate (CSR), crack length rate (CLR), and crack thickness rate (CTR) should be calculated separately according to formulas 1, 2, and 3, and the crack rate of each section and the average crack rate of each specimen should be reported.

Crack sensitivity rate

Crack length ratio

Crack thickness ratio

Where:

Crack length, in millimeters;

B crack thickness, in millimeters;

W sample width, in millimeters;

The thickness of the T specimen is measured in millimeters.

12. reportReport

The following experimental conditions should be reported:

a) The degreasing method of the sample;

b) The test solution used [Solution A or Solution B (indicating Solution 1 or Solution 2)];

c) The pH value of the test solution before introducing hydrogen sulfide gas;

c) The pH value of the test solution after the start of the experiment (after saturation with hydrogen sulfide gas);

d) The pH value of the test solution after the experiment is completed;

f) The temperature of the experimental solution;

g) The CSR, CLR, and CTR of the three cross-sections cut from each sample, as well as the average values of CSR, CLR, and CTR for each sample, must be reported.

13. Record Form

JC-JL-016 Original Record of Hydrogen Induced Cracking Test

JC-ZL-0808 Instrument and Equipment Usage Record Form

14. Reference Documents

GB/T 8650-2015 Evaluation Method for Hydrogen Induced Cracking Resistance of Pipeline Steel and Pressure Vessel Steel

NACE TM0284-2011 Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking

NACE TM0284-2016 Evaluation of Pipeline and Pressure Vessel Steels for Resistance to Hydrogen-Induced Cracking