Stainless Steel Buttweld Pipe Fittings and Flange
Jan 09, 2026
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We strictly adhere to Stainless Steel Buttweld Pipe Fittings and Flange forging specifications. Unlike casting, our forging process aligns the metal's grain flow with the flange geometry, maximizing impact toughness. Post-forging, every flange undergoes Solution Annealing at 1040°C to dissolve carbides and restore optimal corrosion resistance against intergranular attack.
01
Precision Machining:
200+ CNC Lathes for tight tolerance
Phonographic Finish (Ra 3.2-6.3μm)
➜ Ensuring perfect gasket seating
➜ ASME B16.5 dimensional accuracy
02
Advanced Metallurgy:
Dual Certified 304/304L & 316/316L
Controlled Carbon (0.03% max)
➜ Prevention of weld decay
➜ Ideal for sour gas (NACE) service
03
Large Scale Capacity:
ASME B16.47 Series A & B capability
Machining diameter up to 2000mm
➜ Custom Tube Sheet & Girth Flanges
Here is the list of our products' specification :
|
Products |
Size |
Production Standard |
Carbon steel |
Alloy Steel |
Stainless Steel |
|
Buttweld Pipe Fittings |
1/2"-72" |
ASME/ANSIB16.9/16.28, EN10253, DIN2605/2615/2617 |
A234 WPB, P245GH,P265GH, S235 |
WPL6,WP11, WP5,WP9 |
304/304L/316/ 316L/321 |
|
Flanges |
DN15-DN2000 |
ASTM B16.5/B16.47, EN1092,DIN,BS 4504. |
A105,P235/P245/ P265GH |
P11,P5,P9 |
304/304L/316/ 316L/321 |
Quality starts with the raw billet. We perform 100% Spectrometer Analysis (PMI) on incoming raw material to verify Nickel, Chromium, and Molybdenum content. Our forging process involves strictly controlled heating cycles to refine grain structure. Post-machining, we conduct Ultrasonic Testing (UT) to detect any internal voids or cracks, ensuring that every GNEE flange is structurally sound for safety-critical duties.
01
Raw Material & Forging
- Stainless Steel Plate
- Round Bar
- Blank Cutting
- Sawing
- Circular Saw Cutting
- Cold Heading
- Die Forging
- Ring Rolling
- Free Forging
02
Advanced Machining & CNC Precision
- Laser Cutting
- Pipe Cutting
- Large Flange Machining
- Flange Product Machining
- Fitting Product Machining
- Threaded Product Machining
- Gantry Machining
- Tube Sheet Machining
- 5-Axis Complex Part Machining
- 4-Axis Machining Center
- Square Flange Machining
03
Welding & Surface Treatment
- Automatic Welding
- Manual Welding
- Internal Polishing
- External Polishing
- Marking
- Laser Marking
- Penetrant Testing (PT)
04
Testing, Inspection & Packaging
- Roughness Inspection
- Spectrometry Analysis
- Ultrasonic Testing (UT)
- Carbon Element Analysis
- Wooden Case Packaging
Stainless Steel Butt Weld Fittings Production Range
Stainless Steel Butt Weld Fittings Range & Specification
| Stainless Steel : | ASTM A403 WP 304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904L/ etc. |
| Duplex Steel : | ASTM / ASME SA 815 UNS S31803, S32205, S32550, S32750, S32760 |
| Super Duplex Steel : | ASTM / ASME SA 815 UNS S32750, UNS S32950 |
| Size : | 1/8" NB TO 24" NB. (Seamless & Welded) |
| Wall Thickness : | Sch. 5S To Sch. XXS |
Buttweld Stainless Steel Butt Weld Fittings
| Type of Buttweld Stainless Steel Butt Weld Fittings | |
| stainless steel Elbows – Long Radius | stainless steel Stub Ends/ UNS S31803 Long Stubend |
| stainless steel Elbows – Short Radius | stainless steel Crosses |
| stainless steel Reducing Elbows | stainless steel Reducing Crosses |
| stainless steel 45° Elbows | stainless steel 180° LR Return Bends |
| stainless steel Tees | stainless steel 180° SR Return Bends |
| stainless steel Tees | stainless steel Pipe Bends / Piggable Bends |
| stainless steel Reducers | stainless steel Couplings |
| stainless steel Concentric Reducers | stainless steel Pipe Nipples |
| stainless steel Eccentric Reducers | stainless steel Forged/Plate Cut Rings |
| stainless steel 3D Elbow | stainless steel End Caps / S32205 Collar |
| stainless steel 5D Elbow | stainless steel Forged / Plate Circles |
Stainless Steel Butt Weld Fittings Test Certificates:
Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report as per client specification.
Dynamic Forge & Fittings (I) Pvt. Ltd. offer its Products with Third Party Inspection also. The Inspection Agency can be nominated by clients or Dynamic Forge & Fittings can be arrange the TPI by World reputed Agencies like Bureau Veritas, DNV, LLOYDS, ICB and many other. Stainless Steel Butt Weld Fittings are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. All our fittings are manufactured with tested raw materials and are supplied with NABL approved lab test reports. On demand, we can also provide, Hydro Testing Reports, Non Destructive Test Reports, or Destructive Test Reports.
Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report
GNEE Stainless Steel is highly acclaimed manufacturer of industrial forged flanges (A-182, ANSI B16.5) and plate flanges (A-240, ANSI B16.5). Dynamic Forge & Fittings (I) P. Limited, produces the flanges which meet all international quality standards such as DIN, EN1092-1, BS4504, ANSI, API, MSS, AWWA, UNI, JIS, SANS, GOST, NFE, ISO, AS, NS etc. We are manufacturing 75lbs, 150lbs, 300lbs, 600lbs, 900lbs, 1500lbs, 2500lbs, PN6, PN10, PN16, PN25, PN40, PN63, PN64, PN100, GOST 12820 and GOST 12821, PN0.6MPA, PN1.0MPA, PN1.6MPA, PN2.5MPA, PN4.0MPA, SANS1123 or SABS1123, 600kpa, 1000kpa, 1600kpa, 2500kpa, 4000kpa flange ratings as per application or client's requirement. The Industrial Steel Flanges ratings are very important for flanges application, correct flanges rating will keep the application safe.
GNEE Stainless Steel specializes in manufacturing Slip-On flange, Weld-Neck flange and Lap-Joint Flange, high pressure, large diameter flanges, high yield, Threaded flange and Blind Flange and specialty flanges. Industrial Steel Flanges are manufactured using superior grade of steel like Carbon Steel Flanges A-105 , Alloy Steel Flanges, Stainless Steel Flanges 201/202, 304/304L, 310S, 316/316L, 317L, 321/321H, 347/347H, 904L. These Flanges are most durable and manufactures to fit in different size of Pipes & used as connectors in piping systems to connect pipes to pipes, tees, reducers, elbows, valves and other piping equipments. The majority of our flanges are manufactured from forged steel with a limited amount machined from bar stock. The forged construction provides higher strength and durability to provide long lasting performance in the application.
Do you need your Industrial Steel Flanges or Carbon Steel Flange, Alloy Steel Flange, Stainless Steel Flange shipped to you internationally? Not only do we ship all of our fittings & flanges globally, we will consolidate the order for you and ship it to the closest port near you. We have gained several Orders of Industrial Steel Flanges from countries like US, Canada, Chile, Brazil, UK, Italy, Belgium, France, Portugal, South Africa, Nigeria, United Arab Emirates (UAE), Bahrain, Saudi Arabia, Qatar, Kuwait, Jordan, Malaysia, Thailand, Singapore, Indonesia, Sudan, Kazakhstan, Australia, Israel, Kenya, Russia, Tunisia, Vietnam, Colombia, Sri Lanka, etc.
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