Slip On Flange Manufacturer

What are Slip On Flange?

Slip On Flange, often abbreviated as SORF (Slip-On Raised Face), represent a pinnacle of practical engineering in the piping world. These flanges are meticulously designed to slide directly onto the exterior of a pipe's end, requiring no complex alignment or pre-beveling. Once positioned, they are reinforced with fillet welds on both the interior and exterior surfaces, forming a robust, self-reinforcing joint that distributes stress evenly and minimizes turbulence in fluid flow.

Crafted at Shribhairav Forge using advanced closed-die forging techniques, our slip on flanges begin as premium billets heated to precise temperatures (around 1100-1200°C for carbon steels), then shaped under immense pressure to achieve dense, defect-free microstructures. This process enhances tensile strength—typically 50-80 ksi depending on the grade—while maintaining elongation above 20% for ductility. The result? Flanges that endure cyclic loading, thermal expansion, and corrosive exposures without cracking or deforming.

Unlike threaded or socket weld options, slip on flanges excel in applications where accessibility trumps high-pressure demands, offering a bore diameter slightly larger than the pipe OD (by 1/8" to 1/4") for effortless assembly. Their lightweight profile (e.g., a 4" Class 150 SORF weighs just 3-5 lbs) reduces handling hazards and shipping costs, making them a favorite for retrofits and expansions. At Shribhairav, we go further: Every slip on flange undergoes mandatory heat treatment—normalizing or quenching and tempering—to refine grain structure, followed by CNC machining for razor-sharp bolt hole precision (±0.005" tolerance).

In essence, slip on flanges from Shribhairav Forge aren't mere connectors; they're engineered lifelines for your systems, blending affordability with aerospace-grade reliability. As industries evolve toward net-zero goals by 2030, our eco-conscious forging—using recycled alloys and low-emission presses—ensures your slip on flanges align with sustainable practices.

Standard Specifications for Slip On Flange

Adhering to the latest global benchmarks as of 2025, Shribhairav Forge's slip on flanges conform to rigorous standards that guarantee interoperability and safety. Our production aligns with ASME B16.5 for nominal pipe sizes up to 24", extending to B16.47 Series A and B for larger diameters, ensuring compatibility across international projects.

Key Dimensional and Pressure Specifications

Dimensions: ANSI/ASME B16.5, ASME/ ANSI B16.47 (Series A & B), MSS SP-44, API 605, AWWA C207, ASME / ANSI B16.5 Reducing Flanges, , EN 1092-1 DIN Flanges, BS 10 Flanges and bespoke CAD drawings for non-standard geometries.

Size Range: From ½" (DN 15) to 60" (DN 1500), with seamless construction for sizes under 18" and fabricated options for giants.

Pressure Classes: 150# (2.5 MPa), 300# LBS (5 MPa), 600# LBS (10 MPa), 900# LBS (15 MPa), 1500# LBS (25 MPa), 2500# LBS (42 MPa); also DIN EN1092-1 PN 6/10/16/25/40/63/100 and JIS 10K/16K/20K.

DIN Standards: EN 1092-1 (formerly DIN 2527, 2566, 2573, 2576, 2641, 2642, 2655, 2656, 2627-2638, 2673) for European compliance.

BS Standards: BS 4504 (PN equivalents), BS 1560, BS 10 for UK-centric installations.

Flange Face Types: Flat Face (FF) for low-bolt stress, Raised Face (RF, 1/16" height) for enhanced gasket compression, Ring Type Joint (RTJ) for API 6A high-pressure seals, and Large Tongue & Groove (LTG) for custom fits.

These specs are validated through our in-house hydrostatic testing (up to 1.5x rated pressure) and dimensional verification using CMM (Coordinate Measuring Machines). For 2025 updates, we've incorporated ASME's revised tolerances for high-temperature deviations, ensuring slip on flanges perform flawlessly in fluctuating environments.

Specification	Class 150	Class 300	Class 600	Notes
Max Pressure (bar)	19.6	51.7	103.4	At 38°C ambient
Min Thickness (mm, 6″ size)	9.5	14.3	22.2	Per B16.5
Bolt Circle Dia. (mm, 4″)	114.3	152.4	190.5	8 holes standard
Weight (kg, 4″ CS)	1.6	2.3	4.1	Varies by material

Our slip on flanges also meet NACE MR0175/ISO 15156 for sour service, with optional PWHT (Post-Weld Heat Treatment) to mitigate hydrogen embrittlement.

Materials and Grades of Slip On Flanges

Material selection is the heart of any slip on flange's performance, and at Shribhairav Forge, we source only prime materials from LME-registered suppliers. Our portfolio spans ferrous and non-ferrous alloys, optimized for corrosion resistance (PREN values up to 40+), weldability, and environmental resilience.

Stainless Steel Slip On Flange :

Forged to ASTM A182/A240 specs, these offer austenitic excellence for hygienic and corrosive duties:

Grades: ASTM A182 F304/F304L/F304H (general corrosion), ASTM A182 F316/F316L/F316Ti (Marine/Chloride), ASTM A182 F310/F310S (High-Temp Oxidation), ASTM A182 F321/F321H (Stabilization Against Sensitization), ASTM A182 F317 (Enhanced Mo), ASTM A182 F347/F347H (Nb-Stabilized), ASTM A182 F904L (Pitting resistance).

Duplex Stainless Steel Slip On Flanges manufactured by Shribhairav Forge: Primarily manufactured in grades ASTM A182 F51 / F60 (UNS S31803 / S32205), ASTM A182 F68 (UNS S32304), and ASTM A182 F70 (UNS S32101 – LDX 2101). These alloys consist roughly of 22% Chromium, 5–6% Nickel, 3% Molybdenum, and 0.15–0.20% Nitrogen, which together provide an excellent balance of high strength and corrosion resistance. Duplex 2205 (F51/F60) is the most widely used grade, offering twice the strength of 316L with improved resistance to pitting and stress corrosion cracking. Duplex 2304 (F68) has a lower nickel content, making it cost-effective for moderate chloride environments, while LDX 2101 (F70) serves as a lean duplex alternative with good formability and weldability.

Super Duplex Stainless Steel Slip On Flanges: include high-performance grades such as ASTM A182 F53 (UNS S32750), ASTM A182 F55 (UNS S32760 – Zeron 100), and ASTM A182 F61 (UNS S32550 – Ferralium 255 / UR52N+). These grades typically contain 25% Chromium, 7% Nickel, 3.5–4% Molybdenum, and 0.25% Nitrogen, offering exceptional resistance to localized corrosion in seawater and chemical processing environments. Super Duplex 2507 (F53) provides excellent mechanical properties and resistance to chloride-induced stress cracking, while Zeron 100 (F55) and Ferralium 255 (F61) are preferred for offshore, marine, and high-pressure systems due to their enhanced pitting resistance and higher tensile strength.

Both Duplex and Super Duplex Stainless Steel Slip On Flanges conform to standards such as ASTM A182 / ASME SA182 for forged Slip On Flanges, ASTM A240 / SA240 for plate Slip On Flanges, and ASTM A815 / SA815 for wrought fittings. These materials are widely used across Oil & Gas, Desalination, Petrochemical, Marine, and Power Generation industries.

Their microstructure of approximately equal parts ferrite and austenite ensures high yield strength, excellent corrosion resistance, and long service life, making them a preferred choice for critical applications where reliability under aggressive and high-pressure conditions is essential.

Low Temperature Carbon Steel Slip on Flanges :
ASTM A350, LF2, LF3

Alloy Steel Slip On Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Copper Alloy Steel Slip On Flanges :
ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy Slip On Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020)

ASME B16.5 Raised Faced Slip-On Flanges Available Types

Flanges	Flanges
Slip on Raised Face Flange	Raised Faced Slip-On Flanges
ANSI B16.5 Slip On Flanges	Slip on Flange Dimensions
ASME B16.5 SORF Flanges	ANSI B16.5 Class 150 Slip-On Flanges
Stainless Steel Slip on Flanges Suppliers	SS Slip on Flange
Slip on Plate Flanges Dealer	ASME B16.47 Series A and B SORF Flanges Exporter
ANSI B16.5 class 150 SORF Flange Stockholder	ANSI 150 Slip on Flange Distributors
Carbon Steel Slip on Flange	High Quality SORF Flanges Manufacturer
ASTM A182 Stainless Steel SORF Flange	Duplex Steel Slip on Flange
Super Duplex Steel Slip on Forged Flange	Copper Nickel Slip on Pipe Flanges
High Nickel Alloy SORF Flanges	Hastelloy Flat Faced Slip-On Flanges Stockist
Titanium ASME B16.47 Series A and B SORF Flanges	Inconel Slip on Flanges

ANSI B16.5 Slip On Flanges Application

ASME B16.5 Slip on Flanges are known to deliver exceptional performance and are generally developed for meeting the demands. We offer a broad range of Flat Faced Slip-On Flanges through a worldwide network of stock-keeping branches. These Slip On Flange is use in various industries like :

Stainless Steel Slip on Flanges uses in Oil and Gas Pipeline
Slip on Raised Face Flanges uses in Chemical Industry
Alloy Steel SORF Flanges uses in Plumbing
Flat Faced Slip-On Flanges uses in Heating
Slip on Pipe Flanges uses in Water Supply Systems
ANSI B16.5 Slip on Forged Flanges uses in Power Plant
Slip On Plate Flanges uses in Paper & Pulp Industry
Slip on Flange uses in Food Processing Industry

Flanges	Description	Uses / Applications	Advantages	Disadvantages
Slip-On Flange	The pipe is inserted into the flange bore and fillet welded from both inside and outside.	Low-pressure pipelines, cooling water systems, fire-fighting lines, and general service pipelines.	Easy to align and install. Economical and widely available. Suitable for low-temperature applications.	Lower fatigue strength.Not suitable for high-pressure or cyclic loads.Requires double welding (inside and outside).
Socket Weld Flange	The pipe is inserted into a socket and fillet welded around the outer edge.	High-pressure, small-bore piping in chemical plants, hydraulic lines, and steam systems.	Provides a smooth bore for better flow.Stronger than Slip-On due to socket support.Good fatigue strength.	Limited to small pipe sizes (≤ 2”).Crevice may form between pipe and flange, causing corrosion.More difficult to inspect welds.
Threaded Flange (Screwed Flange)	The flange has internal threads that screw onto a threaded pipe, no welding required.	Temporary or maintenance connections, air and water services, explosive areas where welding is unsafe.	Easy to assemble and dismantle.No welding needed (ideal for flammable environments).Simple installation.	Not suitable for high-pressure or high-temperature service.Threads can corrode or leak over time.Requires precise threading.
Weld Neck Flange	Has a long tapered hub and is butt-welded to the pipe for a smooth stress transition.	High-pressure and high-temperature pipelines, oil & gas, petrochemical, and power generation systems.	Highest strength and integrity.Excellent stress distribution.Ideal for critical and corrosive services.Prevents leakage under repeated stress.	Higher cost and installation time.Requires skilled welding and precise alignment.

DIMENSION OF ANSI B16.5 FLANGES CLASS 150 LBS

Nominal Pipe Size	Nominal Pipe Size	Flange Dia O	Dia of Bolt Circle A	Dia of Bolt Holes D	No. of Holes	Thk of Flange C	Dia of Hub E	S/O & S/W Y	W/N Y	L/J Y	S/O & S/W B	L/J B	Dia of R/F R	Depth of Socket F
NB	INCH	MM	MM	MM	MM	MM	MM	LENGTH MM	LENGTH MM	LENGTH MM	BORE MM	BORE MM	MM	MM
15	1/2	88.9	60.3	15.9	4	11.1	30.2	15.9	47.6	15.9	22.3	22.9	34.9	9.5
20	3/4	98.4	69.8	15.9	4	12.7	38.1	15.9	52.4	15.9	27.7	28.2	42.9	11.1
25	1	107.9	79.4	15.9	4	14.3	49.2	17.5	55.6	17.5	34.5	35.0	50.8	12.7
32	1 1/4	117.5	88.9	15.9	4	15.9	58.7	20.6	57.1	20.6	43.2	43.7	63.5	14.3
40	1 1/2	127.0	98.4	15.9	4	17.5	65.1	22.2	61.9	22.2	49.5	50.0	73.0	15.9
50	2	152.4	120.6	19.0	4	19.0	77.8	25.4	63.5	25.4	62.0	62.5	92.1	17.5
65	2 1/2	177.8	139.7	19.0	4	22.2	90.5	28.6	69.8	28.6	74.7	75.4	104.8	19.0
80	3	190.5	152.4	19.0	4	23.8	107.9	30.2	69.8	30.2	90.7	91.4	127.0	20.6
100	4	228.6	190.5	19.0	8	23.8	134.9	33.3	76.2	33.3	116.1	116.8	157.2	23.8
125	5	254.0	215.9	22.2	8	23.8	163.5	36.5	88.9	36.5	143.8	144.5	185.7	23.8
150	6	279.4	241.3	22.2	8	25.4	192.1	39.7	88.9	39.7	170.7	171.4	215.9	27.0
200	8	342.9	298.4	22.2	8	28.6	246.1	44.4	101.6	44.4	221.5	222.2	269.9	31.7
250	10	406.4	361.9	25.4	12	30.2	304.8	49.2	101.6	49.2	276.3	277.4	323.8	33.3
300	12	482.6	431.8	25.4	12	31.8	365.1	55.6	114.3	55.6	327.1	328.2	381.0	39.7
350	14	533.4	476.2	28.6	12	34.9	400.0	57.1	127.0	79.4	359.1	360.2	412.7	41.3
400	16	596.9	539.7	28.6	16	36.5	457.2	63.5	127.0	87.3	410.5	411.2	469.9	44.4
450	18	635.0	577.8	31.7	16	39.7	504.8	68.3	139.7	96.8	461.8	462.3	533.4	49.2
500	20	698.5	635.0	31.7	20	42.9	558.8	73.0	144.5	103.2	513.1	514.3	584.2	54.0
600	24	812.8	749.3	34.9	20	47.6	663.6	82.5	152.4	111.1	615.9	615.9	692.1	63.5

FAQs

How do you ensure consistent service quality?

We maintain consistent service quality by implementing rigorous training programs, regularly updating our processes, and gathering feedback from customers. This allows us to continuously improve and adapt to their needs, ensuring high standards are met at every touchpoint.

What key factors create memorable customer experiences?

Memorable customer experiences are created by understanding customer needs, providing personalized interactions, ensuring prompt responses, and maintaining a positive, friendly attitude. Consistency in service quality and exceeding expectations are also essential for lasting impressions.

How do you handle customer issues efficiently?

We handle customer issues efficiently by actively listening, identifying the root cause, and offering timely solutions. Clear communication and regular updates keep customers informed, while swift action and follow-up ensure a positive resolution.

What sets your service apart from competitors?

Our service stands out through personalized attention, quick response times, and a commitment to continuous improvement. We prioritize customer satisfaction, consistently adapting to feedback and industry trends to deliver exceptional, tailored experiences.