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Threaded Fittings
SDFL
The ASME B16.5 DN600 Class 300 F51 (2205) stainless steel manhole flange is a large-diameter access flange made for pipeline maintenance openings. It is forged, heat-treated, machined and tested in-house by Shangdian Flange Pipe Fittings Co., Ltd., a Wenzhou-based manufacturer that has produced stainless steel flanges and fittings since 2010. The plant runs the full production chain, including a 5-axis CNC machining center and complete forging and heat treatment lines, and operates dual product lines covering industrial heavy-duty flanges and sanitary high-purity flanges. Its flanges and fittings have been exported to customers in more than 30 countries.
The ASME B16.5 Class 300 dimension table below covers nominal pipe sizes from 1/2 in to 24 in. The DN600 size (NPS 24) is listed in the final row, with all dimensions in inches.
Iten | Details |
FITTIHG TYPE | Standard: 「当前产品标准类型』;90°/180°elbows available upon request |
STAHDARDS | ASTM A270,DIN 11850,3A,ISO 2037;custom standards available |
SIZE RAHGE | Standard:「本产品标准尺寸范围」;custom sizes available per drawing |
BEHDIHG RADIUS | Standard R=1.5D(long radius);1D short radius available on request |
SURFACE FIHISH | Standard mirror polish Ra≤0.8μm;Electropolish Ra ≤0.2μm optional |
ⅢATERIAL | Standard:「本产品默认材质」 |
COHHECTIOH | Butt weld end,orbital welding compatible |
APPLICATIOHS | Food&beverage, dairy, pharmaceutical, brewery, pure water systems |
Nom. Pipe Size | O | T | R | X | No./Dia. of Holes | Bolt Circle Dia | L2 | H | B2 | L | B | r | L3 | B3 | D | C | Thr |
1/2 | 3.75 | 0.56 | 1.38 | 1.5 | 4-0.62 | 2.62 | 2.06 | 0.84 | 0.62 | 0.88 | 0.88 | 0.12 | 0.88 | 0.90 | 0.38 | 0.95 | 0.62 |
3/4 | 4.62 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 2.05 | 1.05 | 1.00 | 1.09 | 1.09 | 0.12 | 1.00 | 1.11 | 0.44 | 1.14 | 0.62 |
1 | 4.88 | 0.69 | 2.00 | 2.12 | 4-0.75 | 3.50 | 2.44 | 1.32 | 1.05 | 1.06 | 1.36 | 0.12 | 1.06 | 1.38 | 0.50 | 1.41 | 0.69 |
1-1/4 | 5.25 | 0.75 | 2.50 | 2.50 | 4-0.75 | 3.88 | 2.56 | 1.66 | 1.38 | 1.06 | 1.70 | 0.19 | 1.06 | 1.72 | 0.56 | 1.75 | 0.81 |
1-1/2 | 6.12 | 0.81 | 2.88 | 2.75 | 4-0.75 | 4.50 | 2.69 | 1.90 | 1.61 | 1.19 | 1.95 | 0.25 | 1.19 | 1.97 | 0.62 | 1.99 | 0.88 |
2 | 6.50 | 0.88 | 3.21 | 3.31 | 8-0.75 | 5.00 | 2.75 | 2.38 | 2.07 | 1.31 | 2.44 | 0.31 | 1.31 | 2.46 | 0.69 | 2.50 | 1.12 |
2-1/2 | 7.50 | 1.00 | 4.12 | 3.94 | 8-0.88 | 5.88 | 3.00 | 2.88 | 2.47 | 1.50 | 2.94 | 0.31 | 1.50 | 2.97 | 0.75 | 3.00 | 1.25 |
3 | 8.25 | 1.12 | 5.00 | 4.62 | 8-0.88 | 6.62 | 3.12 | 3.05 | 3.07 | 1.69 | 3.57 | 0.38 | 1.69 | 3.60 | 0.81 | 3.63 | 1.25 |
3-1/2 | 9.00 | 1.19 | 5.50 | 5.25 | 8-0.88 | 7.25 | 3.19 | 4.00 | 3.55 | 1.75 | 4.07 | 0.38 | 1.75 | 4.10 | / | 4.13 | 1.44 |
4 | 10.00 | 1.25 | 6.19 | 5.75 | 8-0.88 | 7.88 | 3.38 | 4.50 | 4.03 | 1.88 | 4.57 | 0.44 | 1.88 | 4.60 | / | 4.63 | 1.44 |
5 | 11.00 | 1.38 | 7.31 | 7.00 | 8-0.88 | 9.25 | 3.88 | 5.56 | 5.05 | 2.00 | 5.66 | 0.44 | 2.00 | 5.69 | / | 5.69 | 1.69 |
6 | 12.50 | 1.44 | 8.50 | 8.12 | 12-0.88 | 10.38 | 3.88 | 6.63 | 6.07 | 2.06 | 6.72 | 0.50 | 2.06 | 6.75 | / | 6.75 | 1.81 |
8 | 15.00 | 1.62 | 10.62 | 10.25 | 12-1.00 | 13.00 | 4.38 | 8.63 | 7.98 | 2.44 | 8.72 | 0.50 | 2.44 | 8.75 | / | 8.75 | 2.00 |
10 | 17.50 | 1.88 | 12.75 | 12.62 | 16-1.12 | 15.25 | 4.62 | 10.75 | 10.02 | 2.62 | 10.88 | 0.50 | 2.75 | 10.92 | / | 10.88 | 2.19 |
12 | 20.50 | 2.00 | 15.00 | 14.75 | 16-1.25 | 17.75 | 5.12 | 12.75 | 12.00 | 2.88 | 12.88 | 0.50 | 4.00 | 12.92 | / | 12.94 | 2.38 |
14 | 23.00 | 2.12 | 16.25 | 16.75 | 20-1.25 | 20.25 | 5.62 | 14.00 | 13.25 | 3.00 | 14.14 | 0.50 | 4.38 | 14.18 | / | 14.19 | 2.50 |
16 | 25.50 | 2.25 | 18.50 | 19.00 | 20-1.38 | 22.50 | 5.75 | 16.00 | 15.25 | 3.25 | 16.16 | 0.50 | 4.75 | 16.19 | / | 16.19 | 2.69 |
18 | 28.00 | 2.38 | 21.00 | 21.00 | 24-1.38 | 24.75 | 6.25 | 18.00 | 17.25 | 3.50 | 18.18 | 0.50 | 5.12 | 18.20 | / | 18.19 | 2.75 |
20 | 30.50 | 2.50 | 23.00 | 23.12 | 24-1.38 | 27.00 | 6.38 | 20.00 | 19.25 | 3.75 | 20.20 | 0.50 | 5.50 | 20.25 | / | 20.19 | 2.88 |
22 | 33.00 | 2.63 | 25.25 | 25.25 | 24-1.63 | 29.25 | 6.50 | 22.00 | 21.25 | 4.00 | 22.22 | 0.50 | 5.75 | 22.25 | / | 22.19 | 3.13 |
24 | 36.00 | 2.75 | 27.25 | 27.62 | 24-1.62 | 32.00 | 6.62 | 24.00 | 23.25 | 4.19 | 24.25 | 0.50 | 6.00 | 24.25 | / | 24.19 | 3.25 |
The F51 (2205) grade places this flange in the duplex stainless steel family, alongside the SAF 2205 and UNS 32205 grades listed in the material range. Stainless steel, carbon steel, duplex and super duplex stainless steel, line pipe steel, nickel alloy and Cr-Mo alloy grades can be supplied, covering the ASTM A182 designations shown in the specification table. Production complies with multiple international standards, including GOST 12820-80, ANSI B16.5, EN 1092, BS 4504, JIS B2220-2012 and DIN, and the plant holds a TS pressure pipe license together with ISO 9001, ISO 14001 and ISO 45001 certification, CE-PED, AD2000 and EAC. Mature processing technology for nickel-based, Hastelloy, super austenitic and super duplex alloys is available for severe corrosion and high-temperature conditions.
 D2000 Certificate |  PED Certificate |  PED Certificate |
 TS Pressure Pipe Element Manufacturing License |  EAC Certificate |  EAC Certificate |
 ISO 9001 Quality Management System |  ISO 14001 Environmental Management System |  ISO 45001 Occupational Health & Safety System |
Every batch is subject to PMI spectral inspection, with the chemical composition traceable back to the original mill melt number. Dimensional checks are carried out to international standard tolerances, and non-destructive testing - penetrant, ultrasonic and radiographic - is available on request. Surface defects are inspected before dispatch, and third-party inspection by SGS, BV or TUV can be witnessed at the plant. Flanges are packed in export wooden cases with the sealing faces protected by dedicated flange protective caps, and each shipment is marked with batch number and material traceability. Full export documentation, MTR reports, certificates and packing lists are provided, with FCL/LCL sea freight, air freight and international express delivery supported.
This large-diameter flange is used in the petrochemical industry, pharmaceutical industry, waste gas systems, power plants, shipbuilding and water treatment. As a manhole flange for pipeline maintenance, it provides a sealed access point for inspection and maintenance work on industrial piping, and it is also supplied for pipeline sealing and blind-flange duties, including subsea pipeline applications.
Custom production is available per customer drawings, samples or project requirements, covering non-standard dimensions, pressure ratings and sealing face configurations, plus special material grades including sanitary-grade materials. Engineering support covers working condition analysis, material selection and piping solution design. Laser marking can be applied for logo, part number, batch number and project identification, and OEM and ODM services are supported along with custom export packaging and special protection requirements.
F51 is the ASTM A182 designation for the 2205 duplex stainless steel grade, listed in the material range as SAF 2205 and UNS 32205.
The plant supplies flanges from 150# to 2500#, PN0.6 to PN400 and 5k to 40k, with RF, FF, RTJ, groove and customizable sealing surfaces.
Full export documentation is provided with each shipment, including MTR reports, certificates and packing lists, and third-party inspection by SGS, BV or TUV can be arranged.
Non-standard dimensions, pressure ratings and sealing face configurations can be produced per customer drawings, samples or project requirements.
