PA Series Insulated Pipe Anchors

PA Series Insulated Pipe Anchors

Value Engineered Products recognizes the need to provide insulated pipe anchors to complete their line of insulated pipe hangers, slides and guides.

Many competitors promote anchors in their catalogues and provide tables which state allowable vertical and axial loads. These two ratings, however, only apply to a system where the anchor would be 'bracketed' by expansion joints, - i.e. expansion joint - anchor - expansion joint.

In all other 'real world' applications, there are at least six forces at play whose combined stresses must be taken into account. The net, cumulative effect of these combined forces typically far exceeds published 'allowable loads' for insulated anchors. Additional 'moments of force' caused by a variety of system operating factors can easily exceed the highest published load ratings. The type of expansion joints, loops, or bellows used in a system also vary widely in design and load characteristics.

Some mechanical specifications call for 'friction anchors'. This type of anchor should truly be called a 'fiction anchor' as there is no possible way to calculate the ability of this type of unit to operate as an anchor. Each anchor will have a different amount of resistance to movement based on how well the section of insulation matches the pipe and the amount of force applied to the pipe by the clamp. The smallest amount of variation or wear to the insulation insert or deviation in clamping force will change the anticipated (or required) resistance to pipe movement.

For these reasons, Value Engineered Products requires specific temperature ranges, pipe spans, and system applications before making an anchor recommendation. Our 'Light Duty' PA (Pre-Insulated Anchor) is appropriate where 'friction anchors' are called for. Our Heavy Duty PA is an engineered unit and can only be quoted once the required system parameters are provided.

In all cases V.E.P. Pre-Insulated Pipe Anchors require field welding to the pipe. For this reason, true pipe anchors for copper tube cannot be provided.

DATA

Insulation Inserts:

  • Xonotlite calcium silicate - full length.
  • Compressive strength - 900 PSI or 1600 PSI (depending on system design).
  • Temperature limit to 1800° F.
  • Flexural strength - 550 PSI or 800 PSI (depending on system design).
  • Meets ASTM C-656 Type II, E-84, Flame Spread -0-, Smoke Developed -0-.

Anchor Hardware:

  • Steel meeting ASTM A-36. " Powder coated per ASTM B-117 (1000 hour salt spray), ASTM D-3363 (pencil hardness 'H'), and ASTM D-3359 (adhesion '5B').
  • Fasteners are plated - Grade 2, Industrial.

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