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SPECIFICATION FOR 10,000 PSI WORKING PRESSURE THREADED PIPE FITTINGS

Kindly supplied by ICEweb sponsor Prochem - visit them on http://www.prochem.com.au/

Scope

This specification covers 10,000 PSI working pressure screwed pipe fittings manufactured in accordance with the design and material requirements as listed in the following clauses.

Reference documents

ASTM Standards:

2.2 ANSI/ASME/SAE Standards:

Materials

The fittings shall be machined from stainless steel Grade 316 material. The material shall be covered by either of the following specifications: ASTM A182/A182M, A276, A479/A479M or an approved equivalent.

Design criteria

All fittings supplied under this specification shall be designed using the Barlow Formula as stated in SAE J1065.

Male threaded fittings shall be designed with a factor of Safety 4;1(Dimension affected is the outside diameter or across the flat of the hexagon at the weakest inside diameter).

The 10,000 PSI working pressure shall be based on the operating temperatures of -29 Deg C. to 150 Deg C. as allowed in ASME B31.3.

Threads

All fittings supplied under this specification shall be in accordance with ANSI/ASME B1.20.1 NPT (National Pipe Taper) Pipe Threads General Purpose (inch).

5.1. Thread tolerances

NPT threads shall meet the dimensional requirements stated in ANSI/ASME B1.20.1 with the following exception.

The L1 thread gauging requirements shall be as stated below.

When hand tight the plug gauge must engage into female fitting +1/4 to +1 turn below the start of the first scratch mark on the chamfer zone.

Note: the gauge is to be turned towards the body of the fitting.

When hand tight the plug gauge must engage into the female fitting +1/4 to +1 turn below the start of the first scratch mark on the chamfer zone.

Note: the gauge is to be turned towards the body of the fitting.

Marking

Fittings supplied under this specification shall have the following marking requirements. When the shape or the small size of the fitting does not permit the inclusion of all the required markings, they may be omitted in the following order.

  1. Manufacturer’s name or trademark,
  2. Size designation,
  3. Thread designation
  4. Rating designation in either PSI or Kpa,
  5. Melt (heat) identification or traceability number,
  6. Material designation

Certification

Original Mill Certificate or an authorized certificate stating the chemical, mechanical and physical properties of the base material, which has been transferred exactly from the original mill certificate.

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Prochem Pipeline Products
Contact Peter Winter
pwinter@prochem.com.au