SS BELLOWS

Product Description

• Thermal Expansion: Accommodates the lengthening or shortening of pipes caused by extreme temperature changes. [1, 2]
• Vibration Isolation: Damps and absorbs vibrations from pumps, compressors, or engines to protect the piping network. [1, 2]
• Movement Compensation: Handles different types of mechanical shifts:
• Axial Movement: Compression or extension along the straight line of the pipe.
• Lateral Movement: Side-to-side (perpendicular) offset.
• Angular Movement: Bending or rotation around the centerline


Common Types of SS Bellows
• Axial Metal Bellows: Designed primarily for linear expansion and contraction along the main axis. [1]
• Lateral / Universal Expansion Joints: Feature single or dual bellows connected by a spool piece, often fitted with control rods to handle complex multi-directional movements. [1, 2]
• Elbow Pressure Balanced Units: Engineered to absorb combined axial and lateral movements while neutralizing internal pressure thrust forces. [1]
• Welded vs. Formed Bellows: Built via hydraulic or roll-forming of thin stainless sheets or multi-ply welded annular convolutions. [1, 2]

• Grades: Commonly manufactured from high-grade corrosion-resistant stainless steel such as SS 304, SS 316, SS 316L, or SS 321.
• End Connections: Available with weld ends, floating or fixed flanges (such as DIN, ANSI, or JIS standards), or threaded couplings.
• Design Codes: Engineered according to industry standards like EJMA, ASTM, ASME, and DIN. [1, 2, 3, 4]