Yangzhou Tianshun designs and manufactures sway struts for power generation, petrochemical, HVAC, shipbuilding, and nuclear applications. Since 2012, our factory in Jiangsu, China — 35,000 m² with over 100 qualified staff — has supplied pipe restraint devices to projects in more than 45 countries. Every sway strut is built under an ISO 9001:2015 certified quality system and shipped with the necessary test and material documentation.
A sway strut limits lateral movement of a pipe without restraining thermal expansion in the axial direction. In normal operation it accepts slow thermal displacement along the pipe run. When a side force appears — from wind, seismic acceleration, water hammer, rotating equipment vibration, or wave motion on a marine platform — the strut acts as a rigid member, holding the pipe in position and transmitting the load to the building structure or steel rack. This protects pipe welds, flanges, and connected equipment from fatigue damage and impact.
Because the strut can be set at any angle, it works across vertical, horizontal, and inclined installations. The adjustability of its length lets the site team fit it to the as-built gap between the pipe attachment and the structural anchor point, absorbing tolerances that drawings cannot always predict.
The strut tube, end fittings, and hardware are fabricated from carbon steel or low-alloy steel selected for the load and temperature specified. Standard material certificates accompany each batch, confirming mechanical properties and chemical composition. For corrosive or marine environments, stainless steel grades are available.
A telescoping or threaded adjustment mechanism allows the strut to be set to the exact installed length on site. Typical adjustment travel options are ±25 mm, ±50 mm, and ±100 mm. This adjustability means the strut can be installed without cutting or welding, and it compensates for minor misalignment between the pipe shoe and the structure.
To suit different pipe attachment and structural interface arrangements, the strut can be supplied with ball joints, clevis ends, or threaded rod connections. Ball joints allow angular rotation and prevent bending moments from being introduced into the strut tube. Clevis ends provide a simple pinned connection for straightforward installations. We supply the end type that matches the project standard detail.
Standard surface treatment is hot dip galvanizing, which provides uniform coverage inside and outside the tube. For enhanced protection, we offer high-build epoxy coatings, fusion bonded epoxy (FBE), and three-layer polyethylene (3PE) systems. The choice of coating is agreed based on the site atmospheric conditions and operating temperature.
Sway struts are designed and manufactured in accordance with ASME B31.1 and B31.3 for process and power piping, MSS SP-58 for pipe supports, and GB/T standards. When the project specification requires alternative codes, we review the technical compatibility and supply to the applicable standard.
| Parameter | Typical range and options |
|---|---|
| Applicable pipe size | DN50 – DN1200 |
| Load capacity | 0.5 kN to 480 kN |
| Adjustment travel | ±25 mm, ±50 mm, ±100 mm |
| Operating temperature | -40 °C to +550 °C |
| Installation orientation | Vertical, horizontal, inclined |
| Body material | Carbon steel, low-alloy steel, stainless steel |
| End connections | Ball joint, clevis, threaded rod |
| Surface protection | Hot dip galvanized, epoxy, FBE, 3PE |
| Applicable standards | ASME B31.1/B31.3, MSS SP-58, GB/T |
Load ratings above 480 kN and non-standard travels are handled as custom orders. Our engineering team verifies the design for the given load case and provides approval drawings before manufacture.
To match specific installation and performance demands, the following accessories can be included:
Dynamic restraints that add a velocity-sensitive locking feature for occasional impulse loads
Spring vibration isolators combined with the strut to dampen high-frequency vibration in small-bore piping
Rigid connection rods for applications where no length adjustment is required and a simple tie rod is preferred
Upgraded anti-corrosion coatings such as FBE and 3PE for buried or subsea service
These accessories are integrated at the factory, and the complete assembly is tested as a single unit before shipment.
Each sway strut is dimensionally checked and, when applicable, load tested to confirm the specified capacity. For dynamic or seismic applications, we provide test certificates and material traceability to the heat number. Welds are examined by qualified personnel using visual and, where required, penetrant testing.
Our ISO 9001 certified procedures control the entire process, from receiving inspection of steel and coating materials to final assembly and packing. More than 70% of our orders come from repeat clients who trust the performance of our pipe restraints project after project.
Main steam and feedwater lines in thermal and nuclear plants rely on sway struts to restrain lateral movement during steam hammer and seismic events without restricting axial thermal growth.
Pipe racks in process units are equipped with sway struts to limit sway from wind, blast, and two-phase flow vibration. Adjustable length makes them practical for retrofitting into existing congested racks.
Chilled water risers, condenser water lines, and plumbing stacks in tall buildings use sway struts to control lateral movement induced by thermal cycling and building sway. The galvanized finish suits exposed indoor and outdoor locations.
Piping on vessels and offshore platforms faces constant motion from waves and machinery. Sway struts with stainless steel bodies and high-corrosion coatings maintain alignment and protect pipe joints from fatigue in these aggressive environments.
Safety-related piping systems employ sway struts designed to the project-specific nuclear code case, with full material and test documentation packages.
A rigid strut locks all movement, including thermal expansion, which may overstress the pipe. A hydraulic snubber allows slow thermal movement and locks only under fast dynamic motion. A sway strut provides rigid lateral restraint in one plane while permitting axial thermal displacement, making it suitable for applications where the direction of thermal growth is known and the side load is predictable.
Standard carbon steel struts with hot dip galvanized finish can operate up to approximately 350 °C. For higher temperatures up to 550 °C, we use alloy steel and high-temperature coatings or leave the body uncoated. The end connection components are also selected to suit the elevated temperature. We recommend sharing your actual pipe surface temperature during the enquiry so the correct material is chosen.
Yes. The strut can be mounted vertically, horizontally, or at an angle. The ball joint end connections accommodate angular misalignment, and the adjustable length takes up site tolerances in any orientation. The only requirement is that the structure at both ends can carry the specified load.
We regularly supply sway struts with loads above 480 kN, non-standard adjustment travels, and special end fittings. Custom orders are handled with approval drawings and design calculations provided before manufacturing begins.
Each order includes material test certificates, dimensional reports, surface treatment conformance, and when required, functional test records. For nuclear or safety-critical applications, we provide full traceability and compliance documentation as specified in the purchase order.
Standard sway struts with common specifications can be manufactured in four to five weeks. Larger loads, alloy steels, and special coatings may extend the schedule. We confirm the exact delivery date at the time of quotation and maintain transparent production planning throughout.
When you contact us about a sway strut requirement, a dedicated account manager with product engineering knowledge replies within 24 hours. Our team reviews your load data, operating temperature, pipe size, and end connection preference to propose a configuration that fits both the design and the site. Custom lengths, special coatings, and documentation packages are part of our everyday supply, not exceptions.
After delivery, we remain available for installation advice and post-installation support. The long-term confidence of our clients, reflected in repeat business above 70%, confirms that our sway struts perform as expected through years of service.
Yangzhou Tianshun Pipeline Technology Co., Ltd.
35,000 m² facility, Jiangsu, China – exporting to over 45 countries.
Sway struts that hold the pipe laterally while letting it breathe axially.
Address
No.115 Yunhe North Road, Yangzhou City.Shuzhou, China
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If you have any enquiry about quotation or cooperation, please feel free to email us at jsts2021@yeah.net or use the following inquiry form.Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
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