Jul . 29, 2025 14:00 Back to list

High Quality Slip On Flange for Industrial Piping Solutions

Product spotlight: Gost 12820 slip on flange — Advanced solutions for stainless steel slip on flange, slip on pipe flange, and slip on forged steel flange applications in petrochemical, metallurgy, and water supply industries.

1. Slip On Flange Market Trends & Industry Overview (2024)

Slip on flange technology plays a crucial role in pipeline connectivity for oil & gas, petrochemical, water works, and metallurgical industries. According to Grand View Research, the global industrial flange market is projected to grow at a CAGR of 5.6% from 2023 to 2028, with stainless steel slip on flange usage increasing due to corrosion-resistant demands.

Innovations in forging processes, tighter tolerances, and automation are pushing flange quality standards. European and Asian manufacturers are increasingly focusing on high-purity alloys (e.g. 316L, 304L) for critical process safety, aligning with ISO 7005-1 and ANSI B16.5 requirements.

High Quality Slip On Flange for Industrial Piping Solutions

Comparison of Popular Slip On Flange Standards
Standard	Material	Pressure Rating (MPa)	Common Sizes (mm)	Corrosion Resistance	Certification
Gost 12820	Stainless, Carbon Steel	0.6 - 2.5	15 – 630	High (SS304/316)	ISO, EAC, GOST-R
ANSI B16.5	Forged Carbon, SS	1.0 - 6.4	15 – 600	Excellent (316L)	ANSI, ISO 7005-1
EN 1092-1	Carbon, SS, Alloy	0.25 - 40	10 – 1200	Very High	CE, PED
JIS B2220	Stainless, Forged	0.6 – 20	15 – 600	Good	JIS, ISO

Key drivers include increasing investments in replacement of old pipeline infrastructure, reliability demands in hazardous chemical transfer, and rising adoption of slip on forged steel flange for high-pressure applications.

2. Data Visualization: Slip On Flange Technical Parameters & Trends

2.1 Global Slip On Flange Production (2019-2024) (in 1,000 Tons)

2.2 Typical Specification Table for Slip On Flanges

Type	Material	Pressure (PN)	Design Temp (°C)	Bore (DN, mm)	Surface Finish (µm Ra)	Compliance
Flat Face SORF	SS304/316	PN10/16/25	-20 to 400	15-400	3.2 - 6.3	ISO, EN
Raised Face SORF	Forged Steel	PN16/25/40	-10 to 450	20-600	1.6 - 6.3	ANSI
Lap Joint SORF	Carbon Steel	PN6/10	-10 to 300	25-200	6.3	GOST
Threaded SORF	Stainless Steel	PN10/16	-45 to 200	15-300	3.2	JIS

3. Application Scenarios and Technical Advantages of Slip On Flange Solutions

Key industries & benefits:

Oil & Gas (Upstream/Downstream): Reliable sealing, quick installation, and easy alignment for process piping & manifolds.
Petrochemical: Stainless steel slip on flange delivers extended corrosion resistance in aggressive media (H₂SO₄, HCl, NaOH).
Power Generation: Steam and condensate lines using slip on forged steel flange due to fatigue resistance and pressure cycling stability.
Water Supply & Wastewater: Large bore slip on pipe flange for economical jointing, maintenance-friendly.
Metallurgy: Resistance to scaling, temperature shocks, and mechanical stresses.

Technical edge: Slip on flanges are less labor-intensive to install, allowing simultaneous welding both inside and outside the flange hub, enhancing safety against leakage. The flat face (FF) and raised face (RF) designs ensure compatibility with a variety of gaskets, supporting broad media and pressure applications.

4. Manufacturing Process: Gost 12820 Slip On Flange

4.1 Flowchart: From Raw Material to Finished Flange

🛠 Raw Material Inspection (ASTM/ISO certified steel billets/bar) →

🔫 Heating & Forging (1100–1250°C / Hydraulic press forging) →

⚒ Preliminary Shaping (Rolling, forming the flange hub and bore) →

🔧 CNC Machining (Precision turning, drilling, face finish Ra ≤ 6.3 µm) →

📸 Dimensional Inspection (ISO 9001, ANSI B16.5 checks) →

📝 Marking, Cleaning & Packaging (Traceability, anti-corrosion packaging)

Gost 12820 slip on flange production combines drop forging for strength, CNC precision machining for surface finish and dimensioning, and 100% PMI (Positive Material Identification) with NDT (Non-Destructive Testing, e.g., UT/magnetic particle) to ensure ISO 9001:2015 and EN 10204 3.1 compliance.

5. Technical Parameters: Gost 12820 Slip On Flange Specification (Data Charts)

5.1 Gost 12820 Slip On Flange Key Parameters

Parameter	Range	Test Standard
Nominal Diameter (DN mm)	15 ~ 630	ISO 7005-1, GOST 12820
Pressure (PN, MPa)	0.6, 1.0, 1.6, 2.5	EN 1092-1
Material Grade	Q235, 20#, 16Mn, 304, 316L	EN, ASTM, JIS
Corrosion Rate (mm/y)	<0.03 (in SS 316L, H₂SO₄)	ASTM G31
Surface Finish (Ra, μm)	3.2 - 6.3	ISO 4288
Welding Thickness	Min. 95% of pipeline	ISO 9606-1
Nondestructive Testing	100% (Ultrasonic/Magnaflux)	EN 10228-3

6. Manufacturer Comparison: Leading Slip On Flange Suppliers

Supplier	Main Standard	Min Order (pcs)	Key Certification	Delivery Cycle	Notable Clients
HBYS Valves	Gost 12820, EN, ANSI	20	ISO9001, CE, EAC	10-17 days	CNNC, Sinopec, TATA Steel
ALFA Flanges	ANSI, EN	30	API 607, PED	15-25 days	Saudi Aramco, OMV
Metline	DIN, JIS, GOST	10	ISO 14001, ISO 9001	8-14 days	L&T Hydrocarbon
MRC Global	ANSI, MSS-SP	50	ISO, FM, UL	21-35 days	Shell, BASF

HBYS Valves delivers slip on flange orders with third-party DNV/SGS inspection and a 5-year anti-corrosion warranty for stainless and forged flanges, underpinning trust for mission-critical projects.

7. Customization Possibilities & Engineering Support

Material: Carbon steel, stainless steel slip on flange (304, 316L, Duplex), or alloy steels by process/media.
Facing: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) on demand.
Surface: Pickling, anti-rust oil, or epoxy coating for aggressive environments.
Dimensional: Machining within ±0.02 mm; bespoke bolt patterns, tapped holes, or blind execution.
Documentation: EN 10204 3.1/3.2 mill test certs, NACE MR0175/HIC-resistant material on request.
Support: Engineering drawings, 3D modeling, MTO (Material Take-Off) and pre-shipment video inspection.

8. Real-World Applications & Customer Feedback

CNNC Nuclear Cooling Project (Henan, 2022): Installed DN300 & DN400 slip on flange (SS316L, PN16) for tertiary coolant loops. After 18 months, flange joint radiography passed without defect (ISO 5817-A class), with zero leakage and corrosion observed after 12,000+ hours.

PetroChina Polyethylene Plant (Inner Mongolia, 2021): Used 200+ slip on forged steel flange (20#, PN25) for high-temp alkane handling; reduced installation time by 38% and cut maintenance interruptions by 24% per operator feedback.

Singapore PUB Waterworks (2020): Large-bore (DN500, carbon steel) slip on pipe flange delivered with custom coating for marine atmosphere, achieving 4.7× longer service life vs. previous flange types (field study report #PUBWW21).

Frequently Asked Questions on Slip On Flange Technology

1. What are the typical materials for slip on flange production?

Carbon steel (Q235, 20#), stainless steel (304, 316/316L), and alloy steel (16Mn, CrMo) are most common—selected based on media, temperature, and pressure requirements.

2. How do you specify the correct size and pressure?

Size: Refer to DN (diameter nominal, mm) matching the pipeline, and PN (nominal pressure, e.g., PN16 = 1.6 MPa). Always cross-check with pipeline operating pressure plus safety margin.

3. What surface finish is required for tight sealing?

Normally, Ra 3.2-6.3 μm spiral or phonographic finish for gasket seating face is required as per ISO 4288, ensuring compression/tightness.

4. Are stainless steel slip on flange suitable for seawater?

Yes—SS316L or Duplex are highly resistant to seawater pitting and chloride attack; additional epoxy or FBE coating can be applied for severe marine environments.

5. What is the recommended welding procedure?

Two fillet welds (inside and outside edges) per ISO 9606-1—weld bead must completely fuse with pipe and flange hub. Post-weld inspection by magnetic-particle or ultrasonic methods is advised.

6. What installation standards are relevant?

Most projects use ANSI B16.5, EN 1092, or GOST 12820. For critical joints, hydrostatic or pneumatic pressure testing per EN 12266-1 is mandatory.

7. How long is the service life and what warranty is provided?

Under standard operating conditions and regular checks, slip on flange (especially stainless steel) can easily exceed 25 years service life; HBYS Valves offers a 5-year anti-corrosion warranty on request.

9. Delivery, Quality Assurance, and Customer Support

Delivery: Typical supply cycle 10–17 days (ex-works); urgent orders supported with priority production.
Quality: Each slip on flange is 100% tested (ultrasound/dimensions/LPI), barcoded for full traceability and packing per ISO 7005/ASTM A182.
Certification: Mill test certificate EN 10204 3.1/3.2, DNV/Lloyds/SGS third-party inspection, ISO 9001:2015, PED, CE approved.
Service: 24/7 technical support, remote video QA, after-sales on-site troubleshooting on demand.
Warranty: 5 years anti-corrosion guarantee for stainless steel and forged flanges.
Sample policy: Free samples for new customer qualification, global logistics partner.

10. Conclusion: Why Choose Gost 12820 Slip On Flange?

The slip on flange market continues to expand, propelled by technological innovation, stricter international standards, and widespread applicability across critical sectors. Gost 12820 slip on flange, with its advanced forging process, robust quality controls, and broad material compatibility, offers a cost-effective, reliable, and long-life piping solution—especially for users seeking stainless steel slip on flange or slip on forged steel flange advantages.

Selecting the right flange is not only about the material or standard—it’s about trust: Choose certified manufacturers, demand full traceability, and insist on ISO/EN/ANSI-tested products to maximize safety and uptime.

References / Further Reading:

Grand View Research. "Industrial Flanges Market Report". https://www.grandviewresearch.com/industry-analysis/flanges-market
Industry Articles: "Recent Advances on Flange Connection Reliability," Journal of Pressure Vessel Technology. ASME Digital Library
Piping Engineering Forum: Slip On vs. Weld Neck for Corrosive Duty. eng-tips.com discussion
HBYS Valves – Certified Flange Offerings: https://www.hbysvalves.com/gost-12820-slip-on-flange.html
ISO 7005-1, EN 1092-1, ASTM A182, GOST 12820: Piping Standards Documentation.

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