Nascent Fittings Inc.·Carbon Steel
Carbon Steel SLIPON FLANGE
Weld neck, slip-on, blind, socket weld & lap joint flanges in SS, CS, alloy, duplex & nickel. ASME B16.5/B16.47, Class 150–2500, MTCs & export.

- Material
- Carbon Steel
- Grades
- ASTM A234 WPB
- Corrosion
- Moderate
About
Carbon Steel Flanges
Product overview combined with Carbon Steel material context for project selection.
Our integrated facilities include facilities for cutting, forging, ring rolling and machines with CNC lathes, CNC drilling, high capacity forging press and mobile manipulator for making big diameter forged round bars. We also have an in-house heat treatment shop and well equipped laboratory facilities for ensuring the quality of our products.
Manufacturing note
Nascent fittings INC is a leading Manufacturer and Exporter of high-quality Slip on Flanges that are required while disassembling a pipe joint. Slip-on flanges are very common and are available in a large range of sizes to accommodate systems with higher flow rates and throughout. Simply match the flange to the outer diameter of the pipe you intend to connect. Installation is slightly more technical as you’ll need fillet weld both sides to secure the flange to the pipe. A slip-on flange is connected to the pipe or the fittings by two fillet welds, one executed inside and one outside the cavity of the flange. The bore size of a slip-on flange is larger than the outside diameter of the connecting pipe, as the pipe has to slide inside the flange to be connected by the execution of a fillet weld. Slip-on flanges are also defined as “Hubbed Flanges” and they are easy to recognize due to their slim and compact shape. Slip-on Flanges are available in a variety of materials, including Alloy Steel, Carbon Steel, LTCS, Nickel, Monel, Inconel, Hastelloy, Aluminium, Copper & Nickel, Stainless Steel etc.
Typical applications
- Oil & Gas
- Petrochemical
- Chemical Processing
- Power Generation
- Refineries
- Pressure Vessels
Configurations
Carbon Steel Flanges types
Open a type for drawings-aligned specifications.

Carbon Steel BLIND FLANGE

Carbon Steel LAPPED JOINT FLANGE

Carbon Steel LONG WELDNECK FLANGE

Carbon Steel NIPO / WELDO FLANGE

Carbon Steel ORIFICE FLANGE

Carbon Steel REDUCING FLANGE

Carbon Steel SCREWED / THREADED FLANGE

Carbon Steel SLIPON FLANGE

Carbon Steel SPACEER & PADDLE FLANGE

Carbon Steel SPECTACLE BLIND FLANGE

Carbon Steel WELDNECK FLANGE
Carbon Steel grades
Available grades for Flanges
Drawn from the Carbon Steel catalog and this product’s material specification.
ASTM A234 WPB
Standard carbon steel buttweld fitting grade for moderate and elevated temperature service.
Best for · General buttweld piping
Also available in
Other materials for this product
View Flanges in another material grade family.
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Material
Alloy Steel
F1 · F5
View
Material
Duplex Steel
F51
View
Material
Cupro Nickel
Cu-Ni 90/10 (C70600) · Cu-Ni 70/30 (C71500)
View
Material
Monel
Monel 400 · Monel K500
View
Material
Nickel Alloy
Nickel 200 · Nickel 201
View
Material
Hastelloy
Hastelloy C-276 · Hastelloy C-22
View
Material
Titanium
Grade 1 · Grade 2
View
Material
Stainless Steel
F304 · F304H
View
Material
Low Temperature Carbon Steel
ASTM A420 WPL6
View
Material
Copper
C11000 (ETP) · C12200 (DHP)
View
Material
Copper Alloy
UNS C70600 (Cu-Ni 90/10) · UNS C71500 (Cu-Ni 70/30)
ViewCompliance
Standards & certificates
Specifications and documentation typically referenced for this product line — details from our shared compliance catalog.
Standards
12ASTM A182
ASTMForged or rolled alloy and stainless steel pipe flanges, fittings, valves and parts.
- Scope
- Forged and rolled stainless, alloy and duplex steel components for high-temperature service.
- Applies To
- Flanges, fittings, valves and pressure parts
- Typical Grades
- F304/L, F316/L, F11, F22, F91, F51/F60 and related
DIN Standard
DINGerman Institute for Standardization piping / material norms.
- Scope
- Collective reference for DIN dimensional and material standards used on export and EU projects.
- Applies To
- Flanges, fittings and materials when DIN designation is specified
ASME B16.5
ASMEPipe flanges and flanged fittings through NPS 24.
- Scope
- Pressure-temperature ratings, materials, dimensions, tolerances, marking and testing for pipe flanges and flanged fittings.
- Applies To
- Weld neck, slip-on, blind, socket weld, threaded, lap joint and reducing flanges
- Size Coverage
- NPS ½ through 24
- Class Range
- Class 150 to 2500
ASTM B564
ASTMNickel alloy forgings.
- Scope
- Forged nickel alloy flanges, fittings and similar parts.
- Applies To
- Forged flanges and fittings in nickel alloys
ASTM B861
ASTMTitanium and titanium alloy seamless pipe.
- Scope
- Seamless titanium pipe for corrosive and high-performance service.
- Applies To
- Titanium process piping
ASTM B171
ASTMCopper alloy plate and sheet for pressure vessels, condensers and heat exchangers.
- Scope
- Copper and copper-alloy plate for heat-transfer and pressure use.
- Applies To
- Tube sheets, plates and exchanger components
ASTM A234
ASTMPiping fittings of wrought carbon steel and alloy steel for moderate and high temperature service.
- Scope
- Seamless and welded wrought carbon and alloy steel fittings.
- Applies To
- Buttweld elbows, tees, reducers, caps and related forms
- Typical Grades
- WPB, WP5, WP9, WP11, WP22, WP91
ASTM A420
ASTMPiping fittings of wrought carbon steel and alloy steel for low-temperature service.
- Scope
- Wrought fittings suitable for low-temperature pressure piping.
- Applies To
- Buttweld fittings for cryogenic / LT service
- Typical Grades
- WPL6
EN
CENEuropean Norms for materials, flanges and fittings.
- Scope
- Umbrella reference for EN material and flange standards.
- Applies To
- EU-specified piping materials and PN flanges
IS 1239 Part II
BISMild steel tubes, tubulars and other wrought steel fittings — fittings.
- Scope
- Indian Standard covering wrought steel pipe fittings.
- Applies To
- MS / GI fittings commonly used in Indian utility piping
ASTM A105
ASTMCarbon steel forgings for piping applications.
- Scope
- Forged carbon steel piping components for ambient and higher-temperature service.
- Applies To
- Flanges, fittings, valves and similar parts
- Typical Grades
- A105 / A105N
ASTM A694
ASTMCarbon and alloy steel forgings for pipe flanges, fittings, valves and parts for high-pressure transmission service.
- Scope
- High-strength carbon steel forgings for pipeline transmission flanges and fittings.
- Applies To
- Flanges and forged fittings for high-pressure gas/oil transmission
Certificates
5EN 10204 3.1
Mill test certificate with inspection by the manufacturer’s authorized inspection representative, independent of manufacturing.
- Type
- Inspection document (MTC)
- Scope
- States chemical analysis, mechanical test results and heat / lot identification for the supplied material.
- Documentation
- EN 10204 Type 3.1
- Benefit
- Provides traceable material evidence required on most industrial RFQs.
ISO 9001
Quality Management System certification.
- Type
- Quality Management System
- Scope
- Demonstrates a documented QMS covering process control, traceability and continual improvement across manufacturing and supply.
- Benefit
- Assures buyers of consistent product quality and controlled production practices.
- Issued As
- Third-party accredited certificate
PED
Pressure Equipment Directive compliance for equipment placed on the EU market.
- Type
- Regulatory conformity
- Scope
- Design and conformity assessment requirements for pressure equipment and assemblies in the European Union.
- Benefit
- Enables supply of pressure-rated components into EU projects when PED conformity is required.
- Related
- CE marking / Notified Body routes as applicable
IBR
Indian Boiler Regulations approval for boiler-quality piping materials and components.
- Type
- Regulatory approval
- Scope
- Materials and components intended for use under Indian boiler installations.
- Benefit
- Required for many power and process projects under IBR jurisdiction in India.
NACE MR0175
Materials for use in H₂S-containing environments in oil and gas production.
- Type
- Service / sour-service requirement
- Scope
- Limits hardness, microstructure and material selection for sulfide stress cracking resistance.
- Applies To
- Carbon, alloy and CRA piping products ordered for sour service
- Benefit
- Supports upstream oil & gas projects specifying sour-service compliance.
Manufacturing
Crafted with care
Workshop and production views for Carbon Steel SLIPON FLANGE — the same craftsmanship photos from our plant archives, shown in webp.
4 photos




People also ask
Questions about Flanges
Nascent Fittings Inc. answers common buyer questions for this line.
Does Nascent Fittings Inc. manufacture Flanges?+
Yes. Nascent Fittings Inc. manufactures and supplies Flanges for industrial piping projects, with material grades and sizes aligned to project specifications.
Can Nascent Fittings Inc. export Flanges worldwide?+
Yes. We export Flanges globally with standard export packaging, material test certificates, and documentation support for international shipments.
What materials are available for Flanges?+
Flanges is available in carbon steel, alloy steel, stainless steel, duplex, nickel alloys, copper alloys, aluminium, titanium and other project-specific materials as required.
Need pricing for Carbon Steel SLIPON FLANGE?
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