Fully Welded Ball Valve

Technical Summary

Nominal Size: 2” to 48”

Pressure Class: Class 150 to Class 2500

Temperature Range: -29°C to 200°C

Design Standards: API 6D, ASME B16.34

Face to Face: As per manufacturer standard / API 6D

Fire Safe: API 607, API 6FA

Inspection and Testing: API 598, API 6D

Construction and Materials

Body and Pressure Retaining Parts

• ASTM A105
• ASTM A216 WCB
• ASTM A350 LF2
• ASTM A182 F316 / F316L

Internal Components

• Ball: ASTM A105, ASTM A182 F316, ASTM A182 F51
• Stem: ASTM A182 F6a, ASTM A182 F316
• Trunnion: Alloy Steel / Stainless Steel

Sealing System

• Seat: Soft seated / Metal seated
• Gasket: Graphite
• Packing: Graphite

Functional Design

Fully Welded Ball Valve is manufactured with a fully welded body construction that eliminates body joint leakage paths and improves structural integrity under buried, insulated, and high-pressure service conditions.

The welded body design reduces external leakage risk and minimizes maintenance requirements over long operating cycles. This valve is widely used in transmission lines, district heating networks, gas distribution systems, and other applications where compact design, long service life, and reliable shut-off are required.

Material and Grade

Standard Materials

Component	Material	Grade	Typical Application
Body	Carbon Steel	ASTM A105 / ASTM A216 WCB	General industrial, gas distribution, and high-pressure service
Body	Low Temperature Carbon Steel	ASTM A350 LF2	Low temperature service
Body	Stainless Steel	ASTM A182 F316 / F316L	Corrosive and process media
Ball	Stainless Steel	ASTM A182 F316	Corrosion resistance and sealing durability
Ball	Duplex Stainless Steel	ASTM A182 F51	Offshore and chloride environments
Stem	Stainless Steel	ASTM A182 F6a / F316	Torque transmission and corrosion resistance
Trunnion	Alloy Steel / Stainless Steel	ASTM A182 F6a	Load bearing and pressure stability

Extended Materials (On Request)

• Duplex Stainless Steel (F51) for offshore and chloride-rich environments
• Super Duplex Stainless Steel (F53 / F55) for high strength and corrosion resistance
• Alloy 20 (CN7M) for acidic chemical service
• Hastelloy C276 for aggressive chemical applications
• Inconel 625 / 718 for high temperature and pressure service

Additional Information

Valve Type	Fully Welded Ball Valve
Mounting	ISO 5211 direct mounting pad
Operation	Manual, Gear Operated, Electric Actuated, Pneumatic Actuated
Body Construction	Fully Welded Body
Port Configuration	Full Bore / Reduced Bore
Seat Design	Soft seated / Metal seated
Installation	Above ground / Underground / Buried service

End Connections

• Butt weld ends as per ASME B16.25
• Extended weld ends for buried and underground service
• Pup piece extensions for direct pipeline welding
• Flanged ends as per ASME B16.5 / ASME B16.47 (on request)
• Customized welding ends based on pipeline specification

Applications

• Oil and gas industry: transmission pipelines and gas distribution networks
• Petrochemical industry: process isolation and hydrocarbon handling systems
• District heating systems: hot water and energy distribution lines
• Power generation: utility and fuel gas service
• Chemical processing: shut-off in process and transfer lines
• Pipeline infrastructure: buried and long-distance pipeline isolation