# ISO 15761 Compliant Manufacturing Process for Gate Valves
## Introduction to ISO 15761 Standard
The ISO 15761 standard specifies requirements for steel gate valves designed for petroleum, petrochemical, and related industries. Compliance with this international standard ensures that gate valves meet stringent quality, performance, and safety requirements for critical applications.
## Key Stages of ISO 15761 Compliant Manufacturing
### 1. Material Selection and Inspection
The manufacturing process begins with careful selection of materials that meet ISO 15761 specifications. All raw materials undergo rigorous inspection for:
- Chemical composition verification
- Mechanical property testing
- Non-destructive examination
- Traceability documentation
### 2. Precision Machining Operations
CNC machining centers perform critical operations to achieve the tight tolerances required by ISO 15761:
- Valve body machining
- Stem and wedge precision turning
- Seat surface finishing
- Thread cutting for connections
### 3. Assembly and Testing
Assembly follows strict quality control procedures with multiple verification points:
- Dimensional checks at each assembly stage
- Seat leakage testing per ISO 5208
- Hydrostatic shell testing
- Functional operation testing
## Quality Assurance Measures
Documentation and Traceability
Complete documentation trails ensure compliance with ISO 15761 requirements, including:
- Material certificates
- Inspection reports
- Test records
- Heat treatment charts
Final Inspection and Certification
Before shipment, each valve undergoes final inspection and receives:
- ISO 15761 compliance certificate
- Pressure test certificates
- Material test reports
- Operation and maintenance manual
## Benefits of ISO 15761 Compliance
Manufacturing gate valves to ISO 15761 standards provides significant advantages:
- Guaranteed performance in demanding applications
- Enhanced safety and reliability
- Global acceptance in oil and gas projects
- Extended service life with reduced maintenance
## Conclusion
Adhering to the ISO 15761 standard throughout the manufacturing process ensures gate valves meet the highest industry requirements for petroleum and petrochemical applications. The comprehensive quality control measures result in products that deliver reliable performance in critical service conditions.