Steam Turbine Split line bolts

Split line bolts are high-strength fasteners used to secure the upper and lower halves of a steam turbine casing along the horizontal joint, known as the split line or parting plane. These bolts play a critical role in maintaining the structural integrity, pressure containment, and sealing of the turbine casing during operation.

• High Strength and Heat Resistance

• Typically made from alloy steels such as Cr-Mo-V (Chromium-Molybdenum-Vanadium) with excellent creep resistance and thermal stability.

• Designed to withstand high thermal stresses, pressure fluctuations, and vibrations during prolonged turbine operation.

• Accurate Preload Application

• Installed using hydraulic bolt tensioners or torque wrenches to ensure precise preload.

• Correct preload is essential to prevent leakage and joint separation, especially under thermal cycling.

• Even Bolt Distribution

• Positioned at regular intervals along the split line to ensure uniform clamping force.

• Large turbines may have dozens to hundreds of split line bolts depending on the size and design.

Dawopu Produce Steam Turbine Split line bolts by samples or drawing.