Project Description

Alignment Guides

Alignment Guides

In this paragraph, I am going to explain alignment guides. Firstly they are designed to be installed next to expansion joints. Secondly, they are made of steel pipe and copper tube that runs to maintain the center-line of the pipe/tube. The next expansion joints are large-structure. Furthermore, low-mass technology resulting in minimum weight while providing 3-Dimensional alignment using the conservative Spider & Cylinder arrangement.

Moreover, pipe or copper tube systems incorporating expansion joints, ball joints, or loops to absorb expansion must include three major elements. Main and/or intermediate anchors, supports, and alignment guides.

Requirements follow the EJMA, Inc. Standards Do not include internal guides; require an alignment guide to be located 4 diameters from the face of the expansion joint. Expansion joints additional guide 14 diameters from the first guide. Expansion joints with internal guides require only one alignment guide located 10-14 diameters from the expansion joint.

The maximum alignment guide spacing in the intermediate portion of the run is a function of the pipe/tube properties (modulus of elasticity and moment of inertia), the design pressure, and the expansion joint effective area and spring force.

Steel Pipe Guides

Alignment Guides manufactures and inventories standard for nominal pipe size (NPS) steel pipe from 3/4” through 14” with varying insulation thickness. Hot dipped galvanizing, or all stainless steel construction is also available. In tight spaces, rotated housings are available. The maximum operating temperature is 500°F. All stainless steel construction is also available to provide greater corrosion resistance, higher temperatures, or cryogenic systems.

Copper Tube Guides

Alignment Guides manufactures and inventories standard for standard copper tubes from 3/4” through 4” with varying insulation thickness. Hot dipped galvanizing is available as an option. In tight spaces, rotated housings are available. The maximum operating temperature is 400°F. All stainless steel construction is also available to provide greater corrosion resistance.

Product Selection (Part Number) & Ordering Instructions:
  1. Choose Steel Pipe or Copper Tube, then locate the correct Table.
  2. Select the size.
  3. Select insulation clearance: a maximum value equal to or greater than the insulation thickness to be installed.
  4. Verify the Alignment Guide Expansion/Travel stated is equal or greater than the motion occurring at the guide location. For additional expansion, increase the last part number indicator as needed.
  5. Select one of these options below in the example for Hot dipped galvanized steel or stainless steel materials.
  6. Confirm the guide housing “A” spacing will fit into the system. Select the “-45” degree housing and spider option and re-verify the spacing if it does not.

Pipe Alignment Guides

A pipe alignment guide is also known as a spider alignment guide. Pipe alignment guides are designed to take care of the axial alignment of piping because it expands and contracts during operation. It’s most typically installed adjacent to expansion joints and at reasonable distances between the expansion joint and, therefore, the anchor point.

We have a variety of sizes 1″ through 24″ pipe and insulation thickness of 1″ through 4.” Also available in copper tube sizes. Spider alignment guides are usually steel. However, any material you would like is often plain, or Hot-Dip Galvanized with Zinc Plated Bolts & Nuts For maintaining alignment of piping through its axial expansion and contraction cycles.

Normally, two or more pipe alignment guides are used on one piping run to avoid a pivoting effect within the piping system. It’s recommended that the primary guide be located a maximum of 4 pipe diameters from an expansion joint. The second guide should be placed a maximum of 18 pipe diameters from an expansion joint. Additional guides should be used in accordance. Supports are usually required between the intermediate guides to suits standard support practice. Maximum temperature 650° F


1. Attach outer housing to structure by bolting or welding.
2. Remove upper section of housing to open position.
3. Attach spider clamp to a pipe and completely insulate.
4. Set pipe and spider clamp into outer housing.
5. Replace the upper section of housing to the closed position and secure.

Ordering: Specify size, pipe size, insulation, thickness, figure number, name, and finish.

Spider Alignment Guides

Proper pipe alignment is significant to maximize service from expansion joints. These spider alignment guides permit free axial movement of the pipe. Therefore, restricting lateral and angular movement. Location of pipe alignment guides Whenever possible, install the expansion joint on the brink of an anchor. Firstly, locate the anchor or first spider alignment guide. It should be no quite 4 pipe diameters from the expansion joint. Then the second guide should be located no quite 14 pipe diameters from the primary guide.

Guides for Piping

Pipe Alignment Guides should be used with expansion joints. Spider alignment guides help regulate the motion of pipe and expansion joints, ensuring that the joint is subject only to the deflection that it had been designed. Unguided piping, struggling will tend to buckle, sometimes severely. This buckling would deter the expansion joints from working properly. They permit unobstructed axial movement of the pipe while restricting lateral, angular, or buckling movements. Standard spider guides are manufactured to accommodate specific amounts of movement and insulation. A pipe guide assembly consists of an anchored housing and a sliding spider attached to the pipe.