HYDROSTATIC STRESS BOARD

WHO WE ARE
 

 The Hydrostatic Stress Board (HSB) is organized under the Plastics Pipe Institute (PPI) as a board of internationally recognized plastic piping experts. HSB Board members are selected and appointed based on their expertise on the various aspects of plastic pressure piping including application engineering, material science, manufacturing, testing, and formulation.


The primary functions of the HSB are to issue recommendations regarding the long-term strength bases and the hydrostatic design stress (HDS) of thermoplastic piping materials for pressurized applications, and to develop appropriate policies and procedures for the conduct of this activity for the industry. North American plastics pressure pipe standards often reference the HSB’s recommendations.

For more information about the HSB, CLICK HERE.



USEFUL LINKS

Online Database


Listings 


Test Methods & Standards


More HSB Resources

INGREDIENT & MATERIAL LISTINGS
      

Established policies, procedures, and listings are detailed in three documents, PPI TR-2, PPI TR-3, and PPI TR-4. 

PPI TR-2 - PPI PVC Range Composition - Listing of Qualified Ingredients

  • Presents the policies and procedures for listing Ingredients in TR-2 PPI PVC Range Composition
  • Provides lists of Ingredients by their commercial designation that have been accepted by the Hydrostatic Stress Board (HSB) as qualified for use in PPI’s PVC Range Composition
  • Shows allowable use levels for each Ingredient
  • Provides any other applicable limitations.

PPI TR-3 - Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe

  •  Presents the policies and procedures for listing Materials in TR-4 PPI Listing of Hydrostatic Design Basis (HDB), Pressure Design Basis (PDB), Strength Design Basis (SDB) and Minimum Required Strength MRS) Ratings for Thermoplastic Piping Materials or Pipe

PPI TR-4 - PPI Listing of Hydrostatic Design Basis (HDB), Pressure Design Basis (PDB), Strength Design Basis (SDB) and Minimum Required Strength MRS) Ratings for Thermoplastic Piping Materials or Pipe

  • Provides lists of commercial thermoplastic piping materials or pipe, with their recommended long-term strength ratings
  • HSB has an online searchable database where company representative’s contact information is available: https://listings.plasticpipe.org/search
OTHER RELEVANT PPI TRs/ TNs
The HSB's recommendations are often referenced by plastic piping standards for qualifying thermoplastic piping materials for pressure piping service, and for the establishment of pipe pressure ratings. You can find more information in other technical reports HERE.