Quality controls are integral to the John-Valve production process and checks are carried out throughout manufacturing
Quality controls are integral to the John-Valve production process and checks are carried out throughout manufacturing. Each casting procedure is inspected and strictly follows PED and International standards. In addition, each casting has to undergo a series of tests ( destructive or non-destructive, such as PMI, VT, PT, RT, etc.) to ensure our high quality.
VIDEO SHOWCASE
Radiographic Test ( X-Ray ) take from different angles of John-Valve’s Casting piece to ensure quality
John-Valve’s Certified Surveyor’s Dye
Penetration Test
Analysis of the molten alloy's chemical composition using a Spark Spectrometer. After casting and the subsequent Heat Treatment, further testing is conducted using Metallurgical Micro-Structural Analysis. Every casting piece with heat number control and traceability. Additional tests of the Tensile and Charpy impact test, Strength, and the material's hardness by using a Universal Test Machine. For Cryogenic service, we can perform the Charpy test at -196 Celsius degrees. Smoothness test on our machining surface. The additional X-Ray and Dye-penetration tests are available upon the customer's request. Constant visual inspection by the trained inspector helps maintain very high-quality standards. Every valve with torque control. We use the 3D Coordinate Measure Machines to inspect the precision of our product's dimensions.
Exclusive Quality Assurance Procedures
John-Valve’s Low Temperature Charppy Test at Minus degree Celsius in house laboratory (reach to -196˚C )
According to EN 12266-1 & API 598 request, 100% of the Air & Hydrostatic pressure testing is conducted before shipment. We issue the correspondent material certificate and test reports for each of our valves.
Quality controls are integral to the John-Valve production process and checks are carried out throughout manufacturing
Our operational quality assurance system aims to autonomous quality control through proactive prevention, detection, and correction. And documentation throughout the entire value-added production process.
Every team leader and staff member has completed and certified with the ISO-9001 Quality Assurance Program. In addition, training sessions are held regularly to ensure that the best practices and the highest standards are maintained.
In-plant Testing Laboratory Capability :
- 3D coordinate measuring machine
- Air & Hydrostatic test
- Large size valve pressure test up to 48."
- Chemical Analysis
- PMI test
- Tensile & Charpy impact test
- Cryogenic test
- Life cycle test
- NDT- Dye penetration testing and X-Ray testing
- HVOF Metal Ball & Seats Lapping & Testing
Quality Control Traceability:
- Works Certificate/ Mill certificate (EN 10204/3.1) is offered for all of our products
- 100 % Pressure test quality control before shipment.
- 100% Torque control for all our valves
- Heat Treatment process
- All parts are marked with Heat Numbers for traceability and quality control.
- Technical Support for our products
- Fast Replacement of worn parts
- Long term support: We offer up to 10 years of spare parts availability
All these tests and measuring equipment are regularly calibrated and monitored by an independent 3rd party test laboratory.
Standard Quality Assurance Procedure
Chemical Analusis
( Spark Spectrometer )
Parts FromSame Furnace are
Marked with Same Heat Numbers
Microstucture
Examination
Charpy Impact Test
Tensile Test
Examining
Components
Hydrostatic Testing
Air Testing
Tensile Testing
Destructive Testing
Brinell Hardness Test / Charpy Impact Test
Tensile Testing
Destructive Testing
Brinell Hardness Test / Charpy Impact Test