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Pipe fitting flange marking procedure

Pipe fitting flange marking machine, flange and pipe fitting marking procedure at C&N HUITONG. Below is pipe fitting flange marking video, Generic Marking Standards and Requirements have MSS SP-25, ASME B16.5-2020,ASME B16.9 2020. Standard Marking System for Valves, Fittings, Flanges and Unions Manufacturer’s Name or Trademark Rating Designation Material Designation Melt Designation – as required by specification Valve Trim Identification – valves only when required Size Designation Identification of Threaded Ends Ring-Joint Facing Identification Permissible Omission of Markings

There are several techniques in order to mark a pipe, flange, fitting, etc., such as

stamping(Process in which an engraved die is used to cut and stamp leave an impression),

painting(only allowing the pigment to reach some parts of the surface).

Roll stamping, Ink Printing,

Laser Printing etc.

MSS SP-25 standard

MSS SP-25 is the most commonly used marking standard. It contains a variety of specific marking requirements that are too lengthy to list in this appendix; please refer to it when necessary to confirm the markings on a component.

Title and Requirements

Standard Marking System for Valves, Fittings, Flanges and Unions marking example(C&N HUITONG, A105, SCH 80, 150#, 3″, ASME B16.5, F1B.261 HEAT NO.)

  1. Manufacturer’s Name or Trademark
  2. Rating Designation
  3. Material Designation
  4. Melt Designation – as required by specification
  5. Valve Trim Identification – valves only when required
  6. Size Designation
  7. Identification of Threaded Ends
  8. Ring-Joint Facing Identification
  9. Permissible Omission of Markings

Specific Marking Requirements

  • Marking Requirements for Flanges, Flanged Fittings, and Flanged Unions
  • Marking Requirements for Threaded Fittings and Union Nuts
  • Marking Requirements for Welding and Solder Joint Fittings and Unions
  • Marking Requirements for Non-Ferrous Valves
  • Marking Requirements for Cast Iron Valves
  • Marking Requirements for Ductile Iron Valves
  • Marking Requirements for Steel Valves

Marking Requirements Steel Pipe (C&N HUITONG 12IN SCH 9.53 MM API 5L GR B PSL 1 K38854 INT FBE EXT ZINC EPOXY+HIGH SOLID)

ASTM A53
Pipe, Steel, Black and Hot-Dipped, Zinc Coated, Welded and Seamless

  1. Name of Brand of Manufacturer
  2. Kind of Pipe (e.g. ERW B, XS)
  3. Specification Number
  4. Length

ASTM A106
Seamless Carbon Steel Pipe for High-Temperature Service

  1. Marking requirements of A530/A530M
  2. Heat Number
  3. Hydro/NDE Marking
  4. “S” for supplementary requirements as specified (stress-relieved annealed tubes, air underwater pressure test, and stabilizing heat treatment)
  5. Length
  6. Schedule Number
  7. Weight on NPS 4 and larger

ASTM A312
Standard Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe

  1. Marking requirements of A530/A530M
  2. Manufacturer’s Private Identifying Mark
  3. Seamless or Welded

ASTM A530/A530A
Standard Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe

  1. Manufacturer’s Name
  2. Specification Grade
Marking Requirements Fittings (some examples)

ASME B16.9
Factory-Made Wrought Steel Buttwelding Fittings

  1. Manufacturer’s Name or Trademark
  2. Material and Product Identification (ASTM or ASME grade symbol)
  3. “WP” in grade symbol
  4. Schedule number or nominal wall thickness
  5. NPS

ASME B16.11
Forged Fittings, Socket Welding and Threaded

  1. Manufacturer’s Name or Trademark
  2. Material identification in accordance with the appropriate ASTM
  3. Product conformance symbol, either “WP” or “B16”
  4. Class designation – 2000, 3000, 6000, or 9000

Where size and shape do not permit all of the above markings, they may be omitted in the reverse order given above.

MSS SP-43
Wrought Stainless Steel Butt-Welding Fittings

  1. Manufacturer’s Name or Trademark
  2. “CR” followed by ASTM or AISI material identification symbol
  3. Schedule number or nominal wall thickness designation
  4. Size

C&N Range

| elbow | tee | cross | reducer | bend | cap | coupling | plug | nipple | olet | Thread fittings | Butted weld fittings | Socket fittings |

| Flanges : slip on | weld neck WN | orifice | blind | thread | socket weld | SAE | reducing | Ring Joint Flanges | spetacle flange |

| Seamless steel pipe | weld steel pipe |


For more infomration, please visit http://www.cnpipefitting.com/ and https://pipefittingflange.com

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