Pigtail Pipe

• Pigtails, named for their curved shape, are critical flexible connectors in high-temperature tubular furnaces (such as reformers and cracking furnaces). Their core function is to absorb and compensate for mechanical stress generated by thermal expansion and equipment displacement at high operating temperatures. By utilizing their flexible structure, they protect the integrity of the rigid connection points between process tubes and headers, preventing weld cracking or equipment damage caused by excessive thermal stress.