Weld Neck Flanges
Weld neck flanges for butt-welded pipe connections. Match the bore, weld end, material and facing to your piping specification.
Product illustration; final geometry follows the approved drawing.
Steel Flanges
Weld neck flanges — GOST 12821 · Carbon steel / Stainless steel · F321 / CT20 · RF / FF / RTJ
Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
- Product forms
- Weld neck flanges
- Specified standard
- GOST 12821
- Material / grade
- Carbon steel / Stainless steel · F321 / CT20
- Facing
- RF / FF / RTJ
Product overview
Selection reference: Weld neck flanges — GOST 12821 · Carbon steel / Stainless steel · F321 / CT20 · RF / FF / RTJ.
The listed values are alternatives within a series, not one combined specification. Identify the required combination.
Selection identifiers: Specified standard: GOST 12821; Material / grade: Carbon steel / Stainless steel · F321 / CT20; Facing: RF / FF / RTJ.
Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
Please confirm before quotation: Size designations.
Technical specifications
| Product forms | Weld neck flanges |
|---|---|
| Specified standard | GOST 12821 |
| Material / grade | Carbon steel / Stainless steel · F321 / CT20 |
| Facing | RF / FF / RTJ |
| Catalogue reference | HC-0240 |
Confirm the material grade, dimensions, pressure class and standard together against the approved drawing before ordering. Schedule denotes wall thickness, not a pressure rating.
Prepare a clear request for quotation
Send a bill of materials or drawing with item quantities, material grades, dimensions, standard and edition, inspection documents, packing and destination. Identify any requirements that still need technical review.
Contact our sales teamProcurement questions
What should I include in an inquiry?
Weld neck flanges — GOST 12821 · Carbon steel / Stainless steel · F321 / CT20 · RF / FF / RTJ — Include the material grade, dimensions, applicable standard and quantity.
How are dimensions and service suitability confirmed?
Specified standard: GOST 12821; Material / grade: Carbon steel / Stainless steel · F321 / CT20 The applicable standard, mating components and project design conditions must be reviewed together. Size, rating and material combinations are confirmed in the agreed quotation or drawing.
Can I request inspection documents?
List the material certificates, inspection records and traceability documents required by your project. Their scope and availability must be agreed before ordering.
Contact sales
Request a quote
Include the material grade, dimensions, applicable standard and quantity.
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Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
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Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.