3501IS-3502IS Single Inline Seismic & Settling

The rugged in-line construction of the Series 3500 IS seismic expansion joint provides a reliable heavy-duty solution to absorb large multi-plane seismic motions. Designed specifically to connect the piping of two structures that move independently in a seismic event.

The design does not require a change in piping direction and therefore does not add elbows and other components that increase pressure drop and heat loss. The envelope is minimum to facilitate installations in tight fitting areas and retrofitting of existing piping installations. Series 3500 IS expansion joints combine the design techniques of two well established Hyspan products; Hyspan Barco Ball Joints provide lateral offset and rotation, and Hyspan Series 3500 externally pressurized expansion joints provide axial extension or compression. The bellows is enclosed and all component parts are made from standard pipe or equivalent. The installation can be horizontal or vertical as illustrated.

Series 3500 IS seismic expansion joints must be installed between two anchor points that are designed to react to the pressure thrust and bellows spring force of the axial expansion joint, and the lateral force resulting from the flex torque of the ball joints.

The maximum lateral force on the anchor is equal to the break away force which is tabulated in Column 5 of Table 1 for the standard designs. After break away, the force is reduced, and it is not a function of pressure.

The maximum axial force is a combination of the pressure thrust force which is tabulated in Table 2, Pressure and Force Data, and the Axial Spring Rate that is tabulated in Column 4 of Table 1 multiplied by the axial deflection.

The seismic expansion joint shall be fully enclosed in-line construction. Designs requiring elbows or a change in direction are not acceptable. The pressure/temperature rating shall be 150 psig at 400°F. Rated axial and lateral (all planes) motions shall be plus or minus 6″, 12″, 18″ or 24″ as required. The assembly shall consist of a Hyspan Barco Ball Joint at each end for lateral offset, and a Hyspan Series 3500 three ply externally pressurized expansion joint for axial motion. Bellows design shall be in accordance with the Standards of the Expansion Joint Manufacturers Association, Inc. using ASME Section II, Part D allowable stresses. Minimum fatigue life shall be 100 cycles. Internal vented guiding shall be included. All pipe including the expansion joint housing shall be ASTM A53 Gr. B standard weight. The expansion joint shall be Hyspan Series 3500 IS.

Hyspan products are available from Sales Representatives and Distributors, or they can be purchased direct from the factory. The minimum factory order for open account customers, COD shipments, or bank card sales is $100.00 (USD). All major credit or debit cards are accepted. The minimum order for new account applicants is $100.00. Our Confidential Credit Application can be downloaded and forwarded to Hyspan for processing. All orders are subject to the following Terms and Conditions, and the above warranty applies to all material. Please read these documents.

Terms and Conditions

Confidential Credit Application (13.9 KB), can be completed on line.