Test Hose
Why choose us
Production Equipment
Our company has first-class production equipment, including advanced automated production lines, precision cutting and assembly equipment, as well as high-performance pressure testing instruments. All production equipment is regularly maintained and calibrated in accordance with international standards to ensure that each batch of hose produced meets the strict quality requirements.
Our Product
The company mainly produces Sewer Jetting Hose,Ultra High Pressure Thermoplastic Hose,SAE 100 R7 Hose,SAE 100 R8 Thermoplastic Hose,Water Jetting Hose,High Pressure Paint Spray Hose,UHP Series Ultra High Pressure Flexible Hose,High Pressure Sewer Jetting Hose,Waterblasting Lance Hose,Hydraulic Jack Hose,Micro Test Hose,Lubrication Grease Hose,CNG Hose,PTFE braided Hose,SAE100 R14 Hose,etc.
Product Application
Our products are widely used in water jet, hydraulic, oil, gas and automotive industries. From high pressure cleaning to industrial spraying to precision mechanical lubrication, DANFLEX hoses provide efficient and safe fluid transfer solutions for a wide range of industries thanks to their excellent pressure resistance, wear resistance and flexibility.
Production Market
We have high efficiency sales team and competitive price superiority, and attract customers from all over the world, we export to many countries, including Russia, USA,Europe, Mexico, Brazil, India,Singapore,Malaysia, Thailand ,Spain,Chile,Middle east and South Africa. It has been well received by customers at home and abroad.
Test hoses are used as connecting lines between the high pressure system unit and the measuring instruments, both for permanent connections as well as for sporadic checks.
Test hoses are used as well as connection elements in micro hydraulic systems. These hoses are equally used for venting jobs ( avoiding external leaks ) and for the extraction of fluid samples directly from actuator connection lines.
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Why is impulse testing important for hose assemblies?
Impulse testing serves several essential purposes:
Quality Assurance: Impulse testing is a vital part of quality control during the manufacturing process. It helps identify any weaknesses or defects in the hose’s construction before it is released for use. Manufacturers can ensure that their hoses meet or exceed the required performance specifications by adhering to industry standards and performing rigorous impulse testing.
Performance Validation: Hydraulic systems often encounter sudden pressure surges and fluctuations during operation, which is sometimes predictable (presses) but sometimes unpredictable (mobile machinery). Impulse testing assesses how well the hose can handle these pressure variations over time. A hose that can endure repetitive pressure cycles without failure ensures a more reliable and longer-lasting hydraulic system (since any old hose will handle steady working pressure indefinitely).
Safety And Reliability: A hydraulic system failure can lead to catastrophic consequences, including damage to machinery, downtime, and even injury to personnel. Impulse testing helps ensure that hoses are safe and reliable, reducing the risk of accidents and system failures.
Predictive Maintenance: Impulse testing data can provide valuable insights into the hose’s expected lifespan and potential failure points (including recent advancements in IoT technology). This information allows maintenance teams to schedule preventive maintenance and replacement, reducing unplanned downtime and overall maintenance costs.
Product Development And Improvement: Impulse testing also plays a role in the continuous improvement of hydraulic hoses. Feedback from testing can lead to design enhancements, material improvements, and innovative solutions to make hoses more robust and efficient.
Hose Test Methods
Several key test procedures for hydraulic and industrial hoses fall under the SAE J517 and J343 standards. These evaluations focus on environmental concerns and how hose assemblies will perform under different types of stress. Tests can come from manufacturers that maintain internal controls as well as distributors that have standards for the hoses they are marketing. Crucial tests include:
Dimensional Checks—Each hose needs to conform to the dimensions specified for its respective 100R-series hose type. This is considered a quality check for post-production validation.
Proof/leakage Tests—These tests apply pressure up to two times the maximum allowable working pressure (MAWP) to verify that the product will not rupture and that assemblies will not leak.
Change In Length—When a hose is pressurized to the MAWP, it cannot exceed the percentage change listed in SAE J517 for that type of hose.
Burst Test—This test features a constant increase in pressure inside a hose assembly until failure occurs. It determines the safety factor ratio of the product—a minimum of four times the MAWP is required to pass.
Cold Bend—The cold-bend test soaks the hose assembly in a low-temperature fluid, after which the hose is flexed to the minimum bend radius. The hose cannot leak or fail at the leakage pressure stipulated in SAE J343 for that type and size of hose.
Impulse Test—Impulse testing produces high- and low-pressure pulses on assemblies to simulate common machine usage and on/off cycles.
Oil Resistance—Studies are performed to confirm that the hose and the materials the hose is made from can withstand prolonged exposure to the hydraulic fluid being used.
Electrical Conductivity—Hoses and assemblies are checked for electrical resistivity and conductivity, which is a safety concern in many applications.
Vacuum—There should be no evidence of hose blistering or collapse after five minutes at the absolute pressure as specified in SAE J517.
Hydraulic Hose Testing And Standard Guide
The testing process for hydraulic hoses is defined and evaluated by SAE/ISO/EN standards, which contain various tests including hose structural integrity changes, burst and impulse testing. In this article, we will provide a clear guide to these two tests and their standards.
ydraulic hose burst test
The burst test is a hydrostatic pressure test of the hydraulic hose assembly to determine the actual burst strength of the hydraulic hose. When tested, it is generally set at 4 times or more of the basic maximum working pressure. Any signs of leakage, bulging, broken connections or hose rupture below the minimum burst pressure rating specified for the assembly is considered a failure. The maximum burst pressure is a very important operating characteristic that must be understood, respected and followed by hydraulic hose technology to ensure that the hydraulic hose can be used safely. Under normal circumstances, the burst pressure can be as high as 4 times the working pressure, and the burst pressure is much higher to ensure the safety of the hydraulic hose during normal operation.
Hydraulic hose impulse test
Impulse testing is one of the key factors in predicting hose life. These impulse tests subject the hose assembly to a specific number of impulses (fast, very sharp pressure spikes) ranging from 100% to 133% of the hose's maximum working pressure, at maximum operating temperature, with a bend radius of 90° or 180°, and remain in this position for nearly 3 days without stopping (depending on the bore size). To pass the test, the hose must meet or exceed twice the minimum number of impulse cycles specified by the applicable industry standard.
Apart from testing your hoses, it’s critical that hose assemblies are tested for the exact same reason: safety. If you happen to have hydraulic hoses assemblies, below are two different types of tests that are critical to conduct prior to even using a hydraulic hose assembly – regardless of the industry you’re in or the applications you plan on using your commercial hose for.
Proof Pressure Test
The whole purpose of conducting a pressure test on hose assemblies is to ensure that there are no leaks or signs of failure – which are two things that you wouldn’t want. If either of the two occur, the assemblies will not be safe to use going forward and can actually pose serious danger if they are used after a failed proof pressure test.
Normally, the proof pressure test is done at double the working pressure of the hose between 30 and 60 seconds.
Burst Test
When conducting a burst test, one shouldn’t notice leakage, signs of failure, or a burst hose. Like with the proof pressure test, if any of these things are noticed, the hose assemblies are not safe to use and, in turn, should not be used.
To conduct a burst test on hydraulic hose assemblies, the pressure is consistently increased beyond its proof pressure until the assembly is no longer able to be used due to failure. The max pressure or upper pressure range value of 6 to 10 times the max operating pressure is normally reached while this test is being conducted.
Here are key aspects of hydrostatic hose testing
Quality Assurance: One of the primary purposes of hydrostatic hose testing is to verify the quality and reliability of hoses used in critical applications. This testing method helps ensure that hoses are free from manufacturing defects, such as weak spots, cracks, or imperfections, that could lead to catastrophic failures in the field.
Compliance with Standards: Many industries and regulatory bodies mandate the use of hydrostatic testing to comply with safety and quality standards. For instance, organizations like the Occupational Safety and Health Administration (OSHA) in the United States and various industry-specific standards organizations have guidelines that require hoses to undergo periodic testing to meet safety and performance requirements.
Identifying Leaks and Weaknesses: During hydrostatic testing, the hose assembly is pressurized with the testing fluid, and technicians carefully inspect it for signs of leakage, bulging, or other anomalies. If a hose fails this test by showing signs of leakage or bursting, it is deemed unfit for use and must be replaced.
Test Parameters: The pressure to which a hose assembly is subjected during hydrostatic testing exceeds its rated working pressure. The specific pressure level and duration of the test are determined based on industry standards and the hose's intended use. The testing pressure should be maintained for a set period to evaluate the hose's ability to withstand prolonged pressure conditions.
Test Reporting: Test results are documented in a test report, which includes essential information such as the pressure applied, duration of the test, and any observations of leakage or damage. This report serves as a critical record for compliance, quality control, and reference for future maintenance or inspections.
Safety Precautions: Hydrostatic testing involves pressurizing hoses, which can be dangerous if not done correctly. It is crucial to follow established safety protocols, including using appropriate safety equipment, conducting testing in controlled environments, and ensuring that personnel involved in the testing are well-trained in safety procedures.
Periodic Testing: Hose assemblies should undergo regular periodic testing to assess their ongoing reliability. The frequency of testing may vary depending on the industry, the type of hose, and the operating conditions. This can range from annual testing to more frequent testing for critical applications.
Different Types of High-pressure Hose Testing Equipment
There are different types of high-pressure hose testing equipment available, depending on the type of hose being tested and the pressure rating of the hose. Some common types of high-pressure hose testing equipment include:
Air-driven Hydrostatic Test Pumps: These pumps use compressed air to generate hydraulic pressure. They are typically used to test hydraulic hoses.
Gas Boosters: These pumps use compressed gas to generate hydraulic pressure. They are typically used to test high-pressure water hoses and air hoses.
Hose Test Rigs: These rigs provide a controlled environment for testing high-pressure hoses. They are typically used to test hydraulic hoses and high-pressure water hoses.
Hose Test Benches: These benches are used to test high-pressure hoses in a variety of orientations. They are typically used to test hydraulic hoses and high-pressure water hoses.
Our Factory
SHANDONG DANFLEX HOSE CO.,LTD. was founded in 2 0 0 9, located in Ningjin county, Dezhou city ,Shandong province, China.Specializing in the production of thermoplastic ultra high pressure hose and hydraulic hose with high tensile synthetic fiber or steel wire reinforcement for a working pressure range of 2 0 0 to 4 0 0 0 bar and inner diameters ranging from 3 to 2 5 mm.
FAQ
Shandong Danflex Hose Co., Ltd. is one of the most professional test hose manufacturers and suppliers in China, featured by quality products and good price. Please rest assured to buy cheap test hose for sale here and get quotation from our factory. Contact us for customized service.
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