Weld neck flanges / Blind flanges Product series — GOST 33259 · TYPE11 · Stainless steel
Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
Product illustration; final geometry follows the approved drawing.
Steel Flanges
Weld neck flanges / Blind flanges Product series — GOST 12821-80 / GOST 33259 / GOST 12820-80 · Carbon steel · CT20 · PN10 / PN16 / PN25 · 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 / Blind flanges
- Specified standard
- GOST 12821-80 / GOST 33259 / GOST 12820-80
- Material / grade
- Carbon steel · CT20
- Pressure designation
- PN10 / PN16 / PN25
Product overview
Selection reference: Weld neck flanges / Blind flanges Product series — GOST 12821-80 / GOST 33259 / GOST 12820-80 · Carbon steel · CT20 · PN10 / PN16 / PN25 · RTJ.
The listed values are alternatives within a series, not one combined specification. Identify the required combination.
Selection identifiers: Specified standard: GOST 12821-80 / GOST 33259 / GOST 12820-80; Material / grade: Carbon steel · CT20; Pressure designation: PN10 / PN16 / PN25; Facing: RTJ.
Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
For a closed pipe end, confirm the mating flange drilling, facing and required thickness. State whether any tapping or opening is required.
Please confirm before quotation: Size designations.
Technical specifications
| Product forms | Weld neck flanges / Blind flanges |
|---|---|
| Specified standard | GOST 12821-80 / GOST 33259 / GOST 12820-80 |
| Material / grade | Carbon steel · CT20 |
| Pressure designation | PN10 / PN16 / PN25 |
| Facing | RTJ |
| Catalogue reference | HC-0248 |
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 / Blind flanges Product series — GOST 12821-80 / GOST 33259 / GOST 12820-80 · Carbon steel · CT20 · PN10 / PN16 / PN25 · RTJ — Include the material grade, dimensions, applicable standard and quantity.
How are dimensions and service suitability confirmed?
Specified standard: GOST 12821-80 / GOST 33259 / GOST 12820-80; Material / grade: Carbon steel · 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.
Related products
Weld neck flanges / Blind flanges Product series — Carbon steel / Stainless steel · PN40 / PN63
Confirm the neck bore, weld preparation and mating pipe wall together. Identify the required flange facing on the drawing.
Plate Flanges
Plate flanges for flanged pipe connections. Specify the mating flange, facing, material grade and dimensions when requesting a quote.