UNDERGROUND BURIED FULLY WELDED BALL VALVE

Integral Valve Structure

Butt weld end fully welded ball valve is trunnion mounted,forging and welding structure, which is 10~20% lighter than the bolted structure and smaller in volume.Butt weld end fully welded ball valve reduces the leakage point outside the ball valve and improves the reliability of the ball valve.The forging materials are subjected to ultrasonic examination according to ASME nondestructive flaw detection requirements. The welding slope on the connection face is subjected to liquid penetration examination

Corrosion Resistance And Sulfide Stress Resistance

Certain corrosion allowance is left for the body wall thickness. The carbon steel stem, fixed shaft, ball, seat and seat ring are subjected to chemical nickel plating according to ASTM B733 and B656. In addition, various corrosion resistance materials are available for users to select. According to customer requirements, the valve materials can be selected according to NACE MR 0175/ISO 15156 or NACE MR 0103, and strict quality control and quality inspection should be carried out during the manufacturing so as to fully meet the requirements in the standards and meet the service conditions in sulfurization environment.

Welding Of Transition Pipe

During the manufacturing of the fully welded pipeline ball valve, the transition pipe can e welded for the welding ends valve. The transition pipe can be supplied by users or by our company according to user requirements. Please indicate the transition pipe diameter and length A when placing orders.

Technical Specification

Normal Size Range: 2"-24" DN15 to DN600

Normal Pressure Rating: ANSI #150 to 900, PN10 Thru PN150

Material: Carbon Steel & Stainless Steel 

Optional Locking Device or Stem Extension

Ends Connections: W.ExW.E, W.ExFLG 

Optional Direct Mounting to ISO 5211

Full Port or Regular Bore

Double Block and Bleed

NACE MR-01-75

Standards compliance

Design and Manufacture: API 6D, ASME B16.34, EN12516, DIN3357-1

Face to face(end to end): ANSI B16.10,API 6D

Fire-safe: API 607,API 6FA

Butt welded end: ANSI B16.25

Test and inspection: API 598,API 6D