Custom Hydraulic Cylinders for Metallurgical & Heavy Machinery

Tianjin Uranus Hydraulic Machinery Co., Ltd. offers custom hydraulic cylinders for the demanding requirements of the oil and gas industry, including onshore and offshore drilling, wellhead control, and pipeline equipment. With over 30 years of experience and recognition as a national small giant enterprise, we design cylinders that meet API, NACE, and other industry standards for safety and reliability in hazardous environments. Our custom cylinders for blowout preventer (BOP) systems are built to withstand high pressures, corrosive fluids (such as H2S and CO2), and extreme temperatures. We use special alloys such as Inconel, Monel, or 17-4PH stainless steel for critical components exposed to sour service. Sealing systems are selected from materials that resist chemical attack and provide long life under high-pressure cycling. For a deepwater drilling project in the Gulf of Mexico, we supplied BOP actuator cylinders rated for 15,000 psi working pressure and 10,000 psi external hydrostatic pressure at a depth of 3,000 meters. These cylinders passed stringent qualification testing including pressure cycling, temperature cycling, and function tests under simulated subsea conditions. Another application is in wellhead control panels, where compact hydraulic cylinders are used to operate gate valves. We offer custom cylinders with integrated position sensors and manual override capabilities. For an offshore platform in the North Sea, we supplied a set of 50 small-bore cylinders with corrosion-resistant coatings and low-temperature seals to operate reliably in sub-zero conditions. The cylinders are equipped with visual position indicators and have a design life of 20 years. For pipeline inspection gauges (pigs), we provide custom hydraulic cylinders that are used to launch and receive pigs in high-pressure pipelines. These cylinders must have a compact form factor and be capable of withstanding pipeline pressures up to 1,500 psi. We design them with double-acting configurations and integrated velocity fuses to prevent uncontrolled movement. Our manufacturing process for oil and gas cylinders includes rigorous non-destructive testing of all welds and critical areas using radiography and ultrasonic methods. We also perform positive material identification to verify alloy composition. Each cylinder is hydrostatically tested to 1.5 times the rated working pressure and functionally tested with the specified hydraulic fluid. We provide full traceability from raw material to finished product, and our documentation package includes a material test report, NDT records, and a certificate of conformance. Our team is experienced in working with third-party inspectors from DNV, ABS, or Lloyds. For a custom cylinder solution for your oil and gas application and a competitive quote, please contact us.