Is Symmetrical reduction according to EN 10253-2B, carbon steel suitable for my pipeline pressure class and seamless pipe dimensions?

Symmetrical reduction according to EN 10253-2B, carbon steel may be suitable if your pipeline pressure class and seamless pipe dimensions meet these key conditions: - Pressure rating compatibility: Type B fittings (EN 10253-2B) are specified to have full pressure strength equivalent to a pipe of the same outside diameter D and wall thickness T. The product description states working pressures from 71 to 224 bar depending on diameter . ensure your required design pressure falls within that range for the specific DN/diameter you plan to use. - Material suitability: Made of carbon steel P235GH with EN 10204 3.1 material certificate. Confirm P235GHâs mechanical properties, temperature limits and corrosion resistance are acceptable for your media, temperature and environment (consider corrosion allowance, protective coatings or cathodic protection if needed). - Dimensional match: The reducer must match the seamless pipe outer diameter and wall thickness (D and T). EN 10253-2B Type B assumes same D and T as the mating pipe; verify the reducer dimensions and pipe schedule/STD match to ensure butt-weld joint integrity. - Welding and installation: Butt-weld compatibility requires qualified welding procedures and personnel per applicable codes. Check joint prep, root gap and post-weld heat treatment requirements for P235GH and your service conditions. - Codes and safety factors: Verify your overall design uses appropriate allowable stresses, safety factors and code compliance (e.g., PED, ASME or local regulations) for pressure equipment and piping. If your design pressure for the specific diameter lies within 71â224 bar, your seamless pipe dimensions match D and T, and P235GH properties suit the service conditions, Symmetrical reduction according to EN 10253-2B, carbon steel should be suitable. For final confirmation, provide exact DN/diameter, wall thickness, design pressure and temperature so a precise verification can be made.

Can Symmetrical reduction according to EN 10253-2B, carbon steel be supplied with EN 10204 3.1 material certificate for high-pressure installations?

Yes. Symmetrical reduction according to EN 10253-2B, carbon steel can be supplied with an EN 10204 3.1 material certificate for high-pressure installations, provided the manufacturer/test laboratory issues the 3.1 certificate based on inspection and test results (chemical analysis, mechanical tests, non-destructive tests as required) and the product meets the specified pressure ratings (71â224 bar depending on size) and relevant design/installation requirements. Ensure the certificate explicitly references the material P235GH, the specific reducer dimensions/heat numbers, applicable EN 10253-2B standard, and required test results; confirm manufacturer qualification and purchaser witness/third-party inspection if mandated by the project specifications.

What surface treatment options are available for Symmetrical reduction according to EN 10253-2B, carbon steel?

Symmetrical reduction according to EN 10253-2B, carbon steel. Surface treatment options 1. As-welded (no additional surface treatment). standard delivery condition; suitable when subsequent coating or in-plant protection is applied. 2. Shot blasting / grit blasting. removal of mill scale and rust to Sa2Â½ or Sa2 (per ISO 8501-1); improves adhesion for primers and paints. 3. Mechanical cleaning (wire brushing, grinding). for minor scale/rust removal where full blasting is not required. 4. Rust preventive oil / temporary corrosion inhibitor. thin film oil applied for protection during storage and transport. 5. Cold galvanizing (zinc-rich coating). sacrificial protection for moderate environments; provides good undercoat for topcoat systems. 6. Hot-dip galvanizing. continuous zinc coating for long-term corrosion protection in aggressive atmospheres; may require post-fabrication treatment at welds. 7. Primer coating (epoxy, zinc phosphate, or zinc silicate primers). factory-applied primers to protect until final painting or assembly. 8. Two- or three-layer coating systems. e.g., epoxy primer + epoxy intermediate + polyurethane topcoat for enhanced corrosion resistance. 9. Fusion-bonded epoxy (FBE). common for pipeline components, provides durable corrosion protection and good adhesion. 10. Bitumen / trowel-applied mastics. for underground or buried service where thick protective layers are needed. 11. Stainless steel cladding or overlay. for severe corrosion/erosion applications (special order). Notes: - Choice depends on service environment, pressure system requirements, welding/post-weld treatment, and client specifications. - For hot-dip galvanizing and cladding, discuss effects on dimensional tolerances and potential need for post-coating weld treatment. - Material certificate EN 10204 3.1 remains applicable; specify required surface treatment on order.

Symmetrical reduction according to EN 10253-2B, carbon steel

Additional information

Material	CS – steel (cast iron)
Standard length [m]	10, 2

Symmetrical reduction (concentric reducer) for butt welding for pressure applications made from seamless pipes, compliant with standard EN 10253-2B (carbon steel). With material certificate EN 10204 3.1. Commonly used in the industry for the construction of installations and pipelines, as components of complete welded ends for metal and rubber hoses (welded with threaded and flanged ends) and other connections and fittings. Other sizes and materials are also available upon request, including reductions of more than two sizes DN and ASME reductions. Type B fittings (EN 10253-2B) have full pressure strength corresponding to a pipe of the same diameter D and wall thickness T. Other types of fittings for butt welding are available on special order: 45° and 180° elbows, eccentric reducers, tees, end caps. Material: carbon steel P235 GH. Working pressure: from 71 to 224 bar – depending on the diameter.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TK-RS-026-021	Symmetrical reduction 26.9x2.3 / 21.3x2.0, steel P235GH, EN 10253-2B	-	224	In stock	Enquiry
TK-RS-033-021	Reduction symmetrical 33.7x2.6 / 21.3x2.0, steel P235GH, EN 10253-2B	-	206	In stock	Enquiry
TK-RS-033-026	Symmetrical reduction 33.7x2.6 / 26.9x2.3, steel P235GH, EN 10253-2B	-	206	In stock	Enquiry
TK-RS-042-026	Symmetrical reduction 42.4x2.6 / 26.9x2.3, steel P235GH, EN 10253-2B	-	162	In stock	Enquiry
TK-RS-042-033	Reduction symmetrical 42.4x2.6 / 33.7x2.6, steel P235GH, EN 10253-2B	-	162	In stock	Enquiry
TK-RS-048-033	Reduction symmetrical 48.3x2.6 / 33.7x2.6, steel P235GH, EN 10253-2B	-	142	In stock	Enquiry
TK-RS-048-042	Reduction symmetrical 48.3x2.6 / 42.4x2.6, steel P235GH, EN 10253-2B	-	142	In stock	Enquiry
TK-RS-060-042	Reduction symmetrical 60.3x2.9 / 42.4x2.6, steel P235GH, EN 10253-2B	-	128	In stock	Enquiry
TK-RS-060-048	Reduction symmetrical 60.3x2.9 / 48.3x2.6, steel P235GH, EN 10253-2B	-	128	In stock	Enquiry
TK-RS-076-048	Symmetrical reduction 76.1x2.9 / 48.3x2.6, steel P235GH, EN 10253-2B	-	101	In stock	Enquiry
TK-RS-076-060	Symmetrical reduction 76.1x2.9 / 60.3x2.9, steel P235GH, EN 10253-2B	-	101	In stock	Enquiry
TK-RS-088-060	Symmetrical reduction 88.9x3.2 / 60.3x2.9, steel P235GH, EN 10253-2B	-	97	In stock	Enquiry
TK-RS-088-076	Symmetrical reduction 88.9x3.2 / 76.1x2.9, steel P235GH, EN 10253-2B	-	97	In stock	Enquiry
TK-RS-114-076	Symmetrical reduction 114.3x3.6 / 76.1x2.9, steel P235GH, EN 10253-2B	-	84	In stock	Enquiry
TK-RS-114-088	Symmetrical reduction 114.3x3.6 / 88.9x3.2, steel P235GH, EN 10253-2B	-	84	In stock	Enquiry
TK-RS-139-088	Symmetrical reduction 139.7x4.0 / 88.9x3.2, steel P235GH, EN 10253-2B	-	76	In stock	Enquiry
TK-RS-139-114	Symmetrical reduction 139.7x4.0 / 114.3x3.6, steel P235GH, EN 10253-2B	-	76	In stock	Enquiry
TK-RS-168-114	Reduction symmetrical 168.3x4.5 / 114.3x3.6, steel P235GH, EN 10253-2B	-	71	In stock	Enquiry
TK-RS-168-139	Reduction symmetrical 168.3x4.5 / 139.7x4.0, steel P235GH, EN 10253-2B	-	71	In stock	Enquiry

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Symmetrical reduction (concentric reducer) for butt welding for pressure applications made from seamless pipes, compliant with standard EN 10253-2B (carbon steel). With material certificate EN 10204 3.1. Commonly used in the industry for the construction of installations and pipelines, as components of complete welded ends for metal and rubber hoses (welded with threaded and flanged ends) and other connections and fittings. Other sizes and materials are also available upon request, including reductions of more than two sizes DN and ASME reductions. Type B fittings (EN 10253-2B) have full pressure strength corresponding to a pipe of the same diameter D and wall thickness T. Other types of fittings for butt welding are available on special order: 45° and 180° elbows, eccentric reducers, tees, end caps. Material: carbon steel P235 GH. Working pressure: from 71 to 224 bar – depending on the diameter.