Testing & Inspection Services

Hydrostatic testing is a crucial quality assurance process used by Triad Bellows to verify the structural integrity and pressure-handling capability of expansion joints and metal bellows. This test involves filling the unit with water and pressurizing it to 1.5 times its designed working pressure (psig), ensuring the assembly can perform reliably under real-world operating conditions. By simulating these extreme conditions, the hydrostatic test helps detect leaks, deformities, or material failures that could compromise safety or functionality. Each test is meticulously performed by experienced technicians, and every unit that passes receives individual certification from Triad Bellows. This process not only demonstrates the company’s commitment to safety and durability but also reflects its ability to meet the demanding and varied requirements of customers in industries such as power generation, petrochemical, and HVAC. Backed by expert support and responsive customer service, Triad Bellows ensures that every product meets or exceeds performance expectations.

Liquid Penetrant Inspection (LPI) is a non-destructive testing method offered by Triad Bellows to detect surface-breaking defects in non-porous materials such as metal bellows and expansion joints. This technique involves applying a liquid dye to the surface of the component, allowing it to seep into any cracks, voids, or imperfections. After a set dwell time, the excess dye is removed, and a developer is applied to draw out any penetrant trapped in defects, revealing flaws that may not be visible to the naked eye. LPI is especially effective in identifying hairline cracks, laps, porosity, and other surface discontinuities that could affect performance and safety. Triad Bellows performs this inspection method in accordance with industry-recognized standards including ASTM E165, ASTM E1417, and ASME Section V, Article 6. By offering LPI, Triad Bellows ensures a higher level of quality control and reliability for customers with stringent performance requirements. Combined with personalized service and technical expertise, this inspection capability underscores the company’s dedication to delivering defect-free products that meet or exceed customer expectations.

Radiographic inspection is a non-destructive testing method offered by Triad Bellows to detect internal flaws within ferrous and nonferrous metals—especially in welded components prior to forming. This technique uses X-rays or gamma rays to produce an image of the internal structure of a component, revealing hidden discontinuities such as porosity, slag inclusions, incomplete fusion, or cracks that could compromise performance under pressure. Radiographic testing is particularly vital for certifying weld integrity in high-performance applications, helping to ensure the safety and reliability of finished expansion joints and bellows. Triad Bellows conducts all radiographic inspections in accordance with applicable industry standards, including ASTM E164, ASTM E273, ASME Section III (1) NB 2560,5330, and ASME Section VIII (1) UW 11,53. These rigorous testing protocols reflect Triad Bellows’ dedication to quality assurance and its ability to meet the stringent certification requirements of industries such as aerospace, energy, and chemical processing. Coupled with personalized customer service and deep technical expertise, this inspection service reinforces Triad Bellows’ reputation as a trusted partner for precision-engineered solutions.

Helium mass spectrometer testing is one of the most sensitive and reliable leak detection methods available, and Triad Bellows offers this advanced service to ensure the airtight integrity of their metal bellows and expansion joint assemblies. This technique operates on the principle of isolating helium—a small, inert gas—from other gases in a vacuum. During the test, helium is introduced around the component, and any trace of it that escapes through the material or welds is collected and analyzed. The process involves ionizing the helium in a sample and directing it through a magnetic field, where it is separated and measured by a detector. Because helium atoms are extremely small and non-reactive, they are ideal for detecting even microscopic leaks that could go unnoticed by other methods. Triad Bellows uses this highly precise testing to meet the strictest customer requirements, especially in applications involving vacuum systems, high-pressure containment, or hazardous media. As with all of their services, this testing is backed by responsive customer support and a commitment to delivering dependable, high-quality products that perform under pressure.

1. What is the purpose of hydrostatic testing for expansion joints and bellows?
Hydrostatic testing is used to verify the structural integrity of a component by filling it with water and pressurizing it above its normal working conditions. This ensures there are no leaks or weaknesses in the assembly before it is placed into service.

2. How much pressure is used during hydrostatic testing at Triad Bellows?
Triad Bellows performs all hydrostatic tests at 1.5 times the unit’s designed working pressure (psig). This extra margin ensures that the product can safely handle real-world operating conditions.

3. What types of defects can Liquid Penetrant Inspection (LPI) detect?
LPI is highly effective at revealing surface-level defects such as cracks, porosity, laps, and pinholes in non-porous materials. These flaws may not be visible to the naked eye but can compromise the integrity of the component.

4. Which standards are followed for Liquid Penetrant Inspection?
Triad Bellows performs LPI according to recognized industry standards, including ASTM E165, ASTM E1417, and ASME Boiler and Pressure Vessel Code Section V, Article 6.

5. Why is radiographic inspection important for weld quality?
Radiographic inspection allows for the detection of internal flaws in welded components—such as voids, inclusions, or incomplete fusion—without damaging the product. It’s often used to certify welds before forming or final assembly.

6. What standards does Triad Bellows follow for radiographic and ultrasonic inspections?
Testing is conducted to meet ASTM E164, ASTM E273, ASME Section III (1) NB 2560/5330, and ASME Section VIII (1) UW 11/53, depending on the project requirements.

7. How does helium mass spectrometer testing work?
This test detects ultra-small leaks by introducing helium gas around a component in a vacuum. Any helium that escapes is ionized and passed through a magnetic field, where it is isolated and measured for precise leak detection.

8. When should helium mass spectrometer leak detection be used?
Helium testing is ideal when maximum leak sensitivity is required, such as in vacuum systems, high-pressure applications, or components that must remain absolutely leak-free due to safety or performance demands.