# ISO 15761 Compliant Manufacturing Process for Gate Valves
## Introduction to ISO 15761 Standard
The ISO 15761 standard specifies requirements for steel gate valves used in petroleum, petrochemical, and related industries. This international standard ensures that gate valves meet strict performance, safety, and reliability criteria for critical applications.
Manufacturers adhering to ISO 15761 demonstrate their commitment to producing high-quality gate valves that can withstand demanding operating conditions while maintaining optimal functionality.
## Key Stages of ISO 15761 Compliant Manufacturing
### 1. Material Selection and Verification
The manufacturing process begins with strict material selection according to ISO 15761 requirements:
– Verification of material certificates
– Chemical composition analysis
– Mechanical property testing
– Non-destructive testing of raw materials
### 2. Precision Machining Processes
ISO-compliant gate valves undergo meticulous machining operations:
– CNC machining of valve bodies and components
– Thread cutting according to specified standards
– Surface finishing to required roughness levels
– Dimensional verification at each machining stage
### 3. Assembly and Testing
The assembly phase includes critical quality control measures:
– Torque-controlled fastening of components
– Proper seating of gate and seats
– Stem alignment verification
– Hydrostatic testing per ISO 15761 requirements
– Shell and seat leakage tests
## Quality Assurance in ISO 15761 Manufacturing
### Documentation and Traceability
Every ISO 15761 compliant gate valve comes with complete documentation:
– Material test reports
– Heat treatment records
– Non-destructive testing reports
– Final inspection certificates
– Unique serial numbers for traceability
### Final Inspection and Certification
Before shipment, each valve undergoes rigorous final inspection:
– Visual examination of all surfaces
– Dimensional verification
– Functional testing
– Pressure testing documentation
– Application of identification markings
## Benefits of ISO 15761 Compliance
Manufacturing gate valves according to ISO 15761 offers significant advantages:
– Ensured compatibility with international pipeline systems
– Reduced risk of premature failure in service
– Improved safety for personnel and environment
– Enhanced reliability in critical applications
– Global acceptance in petroleum and petrochemical industries
## Continuous Improvement in Manufacturing
Leading manufacturers don’t just meet ISO 15761 requirements – they exceed them through:
– Regular process audits
– Employee training programs
– Investment in advanced manufacturing technologies
– Feedback loops from field performance
– Ongoing research and development
By maintaining strict adherence to ISO 15761 while pursuing continuous improvement, manufacturers deliver gate valves that set the standard for quality and performance in the industry.