Fully Welded Ball Valve

Fully welded ball valves feature a one‑piece welded body with no flanges or bolts. Because the valve body is made from the same material as the pipe, the entire assembly becomes a single, strong structure after welding.
Specific Applications
Fully welded ball valves are commonly found in city gas lines, district heating systems, long‑distance pipelines, petrochemical plants, steel mills, and power stations. They are well suited for natural gas, steam, oil, corrosive media, and other high‑risk fluids that require buried installation.
Key Features
Zero‑Leakage Fully Welded Body – One‑piece construction with no flanges, bolts, or external gaskets. Our fully welded ball valve creates a single, strong structure when welded directly to the pipe.
Designed for District Heating & Long Pipelines – Ideal as a district heating fully welded ball valve for city gas lines, district heating systems, long‑distance pipelines, petrochemical plants, steel mills, and power stations. Handles natural gas, steam, oil, corrosive media, and other high‑risk fluids requiring buried installation.
Ultra‑Long Service Life – Under normal conditions, all welded ball valves from our company exceed 20 years with minimal maintenance. No packing leaks, no flange bolt tightening – truly maintenance‑friendly.
Extreme Temperature & Pressure Range – Carbon‑reinforced PTFE or metal hard seal. Ratings: PN16 to 42 MPa, -196°C up to 815°C. Anti‑static, fire‑safe, and blowout‑proof stem designs standard.
Safety Features Included – Automatic cavity relief and double block‑and‑bleed (DBB) functionality. Adjustable stem height for buried or above‑ground installation.
Fully Customizable – Materials: carbon steel, stainless steel, or alloy steel. Actuation: hand lever, gearbox, electric, or pneumatic. Design standards: API 6D, ASME B16.34, or GB/T 12234.
Quality Certification
We hold ISO 9001, ISO 14001, and ISO 45001 certifications, plus a special equipment production license (TS).  Our products are made to API, ANSI, JIS, ISO, BS, JB, and GB standards. This covers material checks, non‑destructive testing, precise measurements, and valve strength/sealing performance.
Custom Manufacturing Services
You send us a drawing or sample, and we review the requirements. Then we confirm the drawing and give you a quote — faster if you provide a 3D model. After order confirmation, we schedule batch production.