Product Overview
Welded Globe Valve is designed for flow regulation and shut-off in high-pressure and high-temperature pipeline systems. The welded end connection provides a permanent joint, reducing potential leakage points compared with flanged connections.
It is suitable for industrial systems where reliability under thermal and pressure cycling is required.
Technical Specifications
|
Size Range |
DN50 – DN300 / 2" – 12" |
|
Pressure Rating |
1.6 MPa – 10.0 MPa / Class 150 – Class 600 |
|
Temperature Range |
-29°C to 425°C (-20°F to 800°F) for Carbon Steel; up to 538°C (1000°F) for Stainless Steel |
|
Body Materials |
ASTM A216 WCB / ASTM A351 CF8 (304) / ASTM A351 CF8M (316) |
|
Connection Type |
Butt-Welded (BW) Ends (ASME B16.25 Compliant) |
|
Design Standards |
ASME B16.34 / BS 1873 |
|
Testing & Inspection Standard |
API 598 / ISO 5208 |
|
Bonnet Type |
Bolted Bonnet (BB) / Pressure Seal Bonnet (PSB) for ultra-high pressure applications. |
|
Actuation Options |
Handwheel, Bevel Gear, or ready for Pneumatic / Electric Actuator mounting (ISO 5211 top flange available upon request). |
Cross-Section & Main Material List
To ensure longevity under frequent throttling and severe conditions, every internal component is machined from premium-grade alloys:
Body & Bonnet: Standard ASTM A216 WCB or corrosion-resistant ASTM A351 CF8M. Heavy-duty wall thickness fully complies with ASME B16.34 to contain pressure surges.
Disc & Valve Seat: Overlayed with Stellite hardfacing (CoCr alloy) and CNC-ground to provide exceptional resistance against erosive wear and cavitation.
Stem: High-strength ASTM A182 F6a / F316 stainless steel, precision-burnished to prevent packing friction.
Stem Packing: Die-formed flexible graphite rings certified to low-emission benchmarks, maintaining a tight stem seal over thousands of operational cycles.
Typical Applications & Industries
Power Generation: Main steam isolation lines, boiler feedwater systems, and turbine bypass loops.
Oil & Gas / Refining: High-pressure hydrocarbon processing, severe-service transport, and catalytic cracking units.
Chemical Processing: Hazardous chemicals, volatile organic compounds (VOCs) containment, and high-temperature chemical synthesis.
Pulp & Paper / Steam Utilities: High-pressure steam distribution networks and plant utility piping.
Quality Assurance & Certificates
Quality Management: Factory operated under an ISO 9001:2015 certified framework.
Pressure Equipment Compliance: CE / PED compliant for European Union industrial projects.
Welding Qualifications: All automated and manual welding procedures (GTAW/GMAW) and operators are strictly qualified to ASME Section IX (WPS & PQR).
Material Traceability: Direct permanent stamping of heat numbers on pressure-retaining components for lifetime tracking.
Heavy-Duty Packaging & Export Logistics
We understand that international transport can be punishing. We ensure your valves arrive in pristine, ready-to-install condition:
Anti-Rust Protection: Internal flow passages and seats are coated with a high-performance, thin-film rust-preventative oil.
Bevel Protection: Butt-weld ends are sealed with heavy-duty, impact-resistant plastic caps to prevent site bevel damage and debris ingress.
Seaworthy Crating: Valves are securely blocked and braced within ISPM 15 compliant, fumigated wooden cases lined with industrial moisture barriers.
FAQ
Q: Can you machine custom weld end profiles to match our piping schedule?
A: Yes. We precision-machine the butt-weld ends to match your specific piping schedules (including Sch 40, Sch 80, Sch 160, or XXS) strictly according to your engineering drawings or ASME B16.25 standards.
Q: Do you accept Third-Party Inspection (TPI) before shipment?
A: Absolutely. We regularly host independent agencies (including SGS, Bureau Veritas, TÜV, and Lloyd's Register) at our facility for witness hydrostatic testing, dimensional verifications, and compliance audits.
Q: What specific documentation is provided with the valves?
A: Every shipment includes a complete quality dossier: EN 10204 3.1 Mill Test Certificates (MTC), Radiographic (RT) or Ultrasonic (UT) welding seam reports, and API 598 pressure test certs tied directly to the valve's stamped heat number.
Q: What is your warranty policy for high-cycle or severe-service applications?
A: We provide a standard 12-month warranty from commissioning or 18 months from shipment. For severe thermal or pressure cycling, we offer extended warranty options and engineering consultations to ensure optimal material selection.
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