When it comes to industrial valve connections, carilovalves offers extensive customization options that address virtually every specification requirement across multiple industries. Since establishing operations in 2000 in Wenzhou, China, the company has developed comprehensive manufacturing capabilities that allow clients to specify exact connection configurations, materials, dimensions, and performance characteristics for their specific applications.
Threaded Connection Options
Carilovalves provides multiple threading standards for valve connections, ensuring compatibility with global pipeline systems. The company manufactures NPT (National Pipe Thread), BSPT (British Standard Pipe Thread), and BSPP (British Standard Parallel Pipe) threaded connections across their entire product line.
Thread specifications include:
- 1/4″ to 4″ NPT threaded connections for North American markets
- BSPT threads ranging from Rc 1/4 to Rc 2 for European and Asian applications
- BSPP parallel threads with G 1/4 to G 2 configurations
- Custom thread specifications available for specialized industrial requirements
- Thread engagement depths customized based on pressure rating requirements
The manufacturing facility employs precision threading equipment capable of achieving Class 2 tolerance standards, with thread pitch verification performed using digital coordinate measuring machines (CMM) accurate to 0.001mm.
Flanged Connection Customization
For applications requiring flanged connections, Carilovalves manufactures valves compatible with all major international flange standards. The company’s flanged valve offerings span multiple pressure classes and face-to-face dimensions.
| Flange Standard | Size Range | Pressure Classes | Face-to-Face Options |
|---|---|---|---|
| ASME B16.5 | 1/2″ – 24″ | 150# – 2500# | RF, FF, RTJ |
| EN 1092-1 | DN15 – DN600 | PN10 – PN160 | Type A, Type B, Type C |
| JIS B2220 | 10A – 600A | 10K – 40K | RF, FF |
| DIN 3202 | DN15 – DN300 | PN16 – PN40 | Standard series F1/F2 |
Flange facing options include raised face (RF), flat face (FF), ring type joint (RTJ), and tongue and groove configurations. Surface finish specifications can be tailored from 125 Ra to 500 Ra depending on sealing requirements.
Welding End Connections
Carilovalves manufactures butt-weld and socket-weld end connections with precise dimensional control. The company maintains strict weld quality procedures in compliance with ASME Section IX and EN ISO 15614 standards.
Weld end specifications include:
- Butt-weld ends: Schedule 10S through XXH for ASME B36.10M pipe
- Socket-weld ends: 1/2″ to 3″ sizes per ASME B16.11
- BW end ID tolerance: ±0.5mm for standard applications, ±0.1mm for high-precision requirements
- Weld bevel angles: 30° ±2° standard, custom angles available
- Wall thickness matching: Seamless welding preparation for leak-free joints
The factory maintains a dedicated welding department staffed with 12 certified welders holding ASME IX qualifications, including 6G position certifications for pipe welding and special process qualifications for stainless steel and alloy materials.
Material Selection for Connection Components
Connection materials are selected based on application parameters including fluid media, temperature, pressure, and environmental conditions. Carilovalves offers material customization across all connection types with full traceability documentation.
Material selection directly impacts connection longevity and maintenance intervals. For corrosive media handling, we recommend alloy-rich materials even for connection components that appear secondary to the main valve body.
| Material Grade | Application Environment | Temperature Range | Connection Compatibility |
|---|---|---|---|
| WCB/A105 | General hydrocarbon service | -29°C to 427°C | Standard flanged, threaded, BW |
| SS316/316L | Corrosive media, water service | -198°C to 800°C | All connection types |
| SS304/304L | Mild corrosive, food grade | -198°C to 760°C | All connection types |
| CF8M (Cast 316) | Chemical processing | -268°C to 816°C | All connection types |
| Alloy 20 | Sulfuric acid, phosphoric acid | -198°C to 538°C | Flanged, BW preferred |
| Monel 400 | Hydrofluoric acid, seawater | -198°C to 538°C | All connection types |
| Duplex 2205 | High pressure, chloride environments | -40°C to 316°C | All connection types |
| Super Duplex 2507 | Offshore, desalination | -40°C to 316°C | All connection types |
Internal connection surfaces receive secondary material treatment including hardfacing with Stellite 6 or equivalent alloys for erosion resistance in high-velocity applications. Chrome carbide overlay options provide 62+ HRC hardness for abrasive media handling.
Pressure and Temperature Customization
Connection design pressure and temperature ratings are engineered to match or exceed pipeline system requirements. Carilovalves validates connection performance through comprehensive testing protocols.
- Maximum working pressure: Up to 2500# (41.4 MPa) for flanged connections
- Cold working pressure: 1.5x rated pressure with hydrostatic verification
- Burst test pressure: 4x rated pressure for qualification testing
- Temperature range: -268°C (cryogenic) to 816°C (high-temperature steam)
- Thermal cycling capability: 500 cycles minimum without leakage degradation
- Fire-safe testing: API 607 / API 6FA compliant designs available
Sealing Technology Options
Connection sealing methods are customized based on service conditions and maintenance requirements. Carilovalves provides multiple sealing configurations for each connection type.
| Sealing Method | Pressure Rating | Temperature Limit | Reusability | Recommended Application |
|---|---|---|---|---|
| Soft seat (PTFE/RPTFE) | 1000# max | 260°C | Single use | General purpose, chemical |
| Metal seat (stellite) | 2500# | 593°C | Reusable | High-temp, abrasive |
| Graphite packing | 2500# | 450°C | Multiple cycles | Steam, thermal oil |
| Spiral wound gasket compatible | 2500# | 650°C | Replaceable | Critical process |
| Camprofile gasket compatible | 2500# | 538°C | Replaceable | Power, refinery |
For fugitive emission control requirements, Carilovalves offers bellows seal designs achieving <0.5 ppm methane leakage per API 622 testing protocols. Stem extensions with live-loaded packing configurations provide maintenance-free operation for extended cycling intervals.
Special Connection Configurations
Beyond standard connection types, Carilovalves engineers specialized configurations for unique industrial requirements.
Extended Stem Connections
- Standard extension: 50mm to 200mm above pipeline centerline
- Extended bonnet: Up to 600mm insulation length
- Cryogenic extensions: 300mm minimum for LNG applications with vacuum jacketing options
- Material transitions: Stainless to carbon steel connections with metallurgical bonding
Actuator Mounting Connections
- ISO 5211 mounting pads: F03 to F25 standard sizes
- DIN 3337 actuator mounting dimensions
- Female drive shaft: 12mm to 46mm square or double-D configurations
- Bracket and coupling assemblies: Aluminum, carbon steel, or stainless materials
Instrumentation Connections
- Thermowell ports: 1/2″ NPT or NPTF threaded, 100mm to 300mm insertion length
- Pressure gauge connections: 1/4″ NPT or 1/2″ NPT options
- Limit switch mounting: NAMUR top-mounting pattern
- Pilot valve connections: 1/8″ to 1/4″ NPT pilot ports
Custom Dimension Specifications
Carilovalves manufactures valves to non-standard dimensions when project specifications require. The company’s 24+ years of engineering experience supports rapid prototype development for custom connection configurations.
Custom dimension capabilities include:
- Non-standard face-to-face dimensions per customer drawings
- Reduced port configurations: 50%, 70%, 80% of full bore
- Oversized connections for high-capacity flow requirements
- Miniature valves: Connection sizes down to 1/16″ tube fitting
- Custom flange drill patterns for legacy equipment replacement
We regularly manufacture valves with non-standard connections for heat exchanger isolation, sampling systems, and analyzer hookups where space constraints or existing infrastructure dictate specific dimensions.
Surface Treatment and Coating Options
Connection surfaces receive specialized treatments to enhance corrosion resistance, reduce friction, and meet environmental regulations.
| Treatment Type | Thickness | Corrosion Resistance | Application |
|---|---|---|---|
| Electroless Nickel (ENP) | 25-50 μm | Salt spray >500 hours | General corrosion, water |
| Hard Chrome Plating | 20-40 μm | High hardness 65 HRC | Abrasive media, erosion |
| Xylan/PTFE Coating | 25-75 μm | Chemical resistant | Chemical processing |
| Thermal Spray Aluminum | 100-300 μm | High temp oxidation resistance | Offshore, marine |
| Hot Dip Galvanizing | 85 μm minimum | Atmospheric exposure | Infrastructure, water |
| Epoxy Coating (FBE) | 200-400 μm | Buried pipe service | Pipeline, underground |
Internal connection surfaces in contact with media receive electropolishing (EP) treatment achieving 10-15 Ra finish for improved flow characteristics and reduced media adhesion in hygienic applications.
Quality Assurance Documentation
Every custom valve connection receives comprehensive documentation supporting project compliance requirements. Carilovalves provides material traceability from raw material through finished product.
- Material test reports (MTR) per EN 10204 3.1 for all pressure-retaining components
- Positive Material Identification (PMI) verification: 100% of critical connections
- Hydrostatic test certificates: Test pressure = 1.5x design pressure, 100% documentation
- Functional testing: Multiple open/close cycles with torque measurement records
- Weld procedure specifications (WPS) and procedure qualification records (PQR)
- Non-destructive examination (NDE) reports: Dye penetrant, magnetic particle, or ultrasonic as applicable
- dimensional inspection reports: CMM data for critical features
- 3.1 certificates for flange face flatness and surface finish verification
Industry-Specific Connection Solutions
Carilovalves tailors connection specifications based on industry requirements and regulatory frameworks. Different sectors have distinct standards that the engineering team addresses during product development.
Oil and Gas Applications
- API 6D compliant connections for pipeline transmission
- API 608 ball valves with threaded or flanged ends for refinery service
- Weld-end valves meeting ASME B31.3 process piping requirements
- Bonnet extension designs for insulated pipeline configurations
- Cryogenic valves for LNG terminals: 300mm extended bonnets with live load packing
Chemical Processing
- PTFE-lined connections for corrosive media isolation
- Alloy-wetted connections: Hastelloy, Tantalum-clad options
- API 608 trunnion-mounted valves with fire-safe certification
- Double block and bleed configurations with vent/drain connections
- Diaphragm-sealed designs eliminating stem leakage concerns
Power Generation
- High-pressure connections meeting ASME Section III requirements for nuclear service
- Steam service valves: Graphite-packed connections rated to 550°C
- Condensate system valves with drain connections
- Boiler feedwater valves with economizer connections
- ASME B16.34 standard dimensions for interchangeability
Water and Wastewater
- AWWA C507 flanged connections for water transmission
- Ductile iron connections with fusion-bonded epoxy coating
- Flange adapters for ease of maintenance
- Butterfly valve configurations with gear operator connections
- Double flanged long-body designs for penstock applications
Customization Process and Lead Times
The engineering team at Carilovalves guides customers through specification development, prototype fabrication, and production phases. A dedicated project engineer manages each custom order from initial inquiry through shipment.
Typical project timeline for custom connection specifications:
- Specification review and technical clarification: 1-3 business days
- Engineering design and CAD drawing generation: 3-5 business days
- Customer drawing approval cycle: 2-5 business days
- Prototype fabrication and testing: 10-15 business days
- Production tooling and first article inspection: 7-10 business days
- Batch production and quality documentation: Per order quantity
We maintain 3,000+ active valve designs in our engineering database, enabling rapid modification of existing designs for new connection specifications rather than starting from drawings each time.