OEM manufacturer ASME B16.5 · ASME B16.47 · ASTM A105 · ASTM A182 · ASTM A350
Industrial Flanges Manufacturer in India — ASME B16.5 & B16.47
Teshi Group is an OEM manufacturer of forged steel flanges in India. We forge, machine and inspect weld neck, slip-on, blind, socket weld, threaded and lap joint flanges to ASME B16.5 (NPS ½"–24") and ASME B16.47 Series A/B (NPS 26"–60") in carbon steel (ASTM A105, A350 LF2), stainless steel (A182 F304/F304L/F316/F316L/F321) and alloy steel (A182 F11/F22/F91). Every flange is dimensionally inspected and supplied with mill test certificates traceable to the raw-material heat number.
Every lot is dimensionally inspected against the published ASME B16.5 or B16.47 tables before dispatch.
Industrial Flanges — specifications & size ranges
| Type | Standard | Size range | Pressure class / schedule | Material grades |
|---|---|---|---|---|
| Weld Neck | ASME B16.5 | ½"–24" | 150#–2500# | A105, A182 F304/F316, A350 LF2 |
| Slip-On | ASME B16.5 | ½"–24" | 150#–1500# | A105, A182 F304/F316 |
| Blind | ASME B16.5 | ½"–24" | 150#–2500# | A105, A182 F304/F316 |
| Socket Weld | ASME B16.5 | ½"–3" | 150#–1500# | A105, A182 F304/F316 |
| Threaded | ASME B16.5 | ½"–6" | 150#–2500# | A105, A182 F304/F316 |
| Lap Joint | ASME B16.5 | ½"–24" | 150#–2500# | A105, A182 F304/F316 |
| Large Diameter (Series A / B) | ASME B16.47 | 26"–60" | 150#–600# | A105, A350 LF2, A182 F304/F316 |
Industrial Flanges types
24 productsWeld Neck Flange
ASME B16.5 · ASME B16.47
View productOEM manufacturerSlip-On Flange
ASME B16.5 · EN 1092-1 Type 12
View productOEM manufacturerBlind Flange
ASME B16.5 · ASME B16.47
View productOEM manufacturerSocket Weld Flange
ASME B16.5
View productOEM manufacturerThreaded Flange
ASME B16.5 · ASME B1.20.1
View productOEM manufacturerLap Joint Flange
ASME B16.5 · ASME B16.9
View productOEM manufacturerPlate Flange
EN 1092-1 Type 01 · IS 6392
View productOEM manufacturerRing Type Joint (RTJ) Flange
ASME B16.5 · ASME B16.47 Series A
View productOEM manufacturerLong Weld Neck Flange
ASME B16.5 (flange end) · Manufacturer standard / client drawing (barrel)
View productOEM manufacturerSpectacle Blind, Spade & Spacer
ASME B16.48
View productOEM manufacturerOrifice Flange
ASME B16.36 · ASME B1.20.1
View productOEM manufacturerReducing Flange
ASME B16.5
View productOEM manufacturerSquare Flange
Manufacturer standard / client drawing
View productOEM manufacturerAnchor Flange
ASME B31.4 / B31.8 / B31.3 (design) · Manufacturer standard / client drawing
View productOEM manufacturerExpander Flange
ASME B16.5 (flange end) · Manufacturer standard (body)
View productOEM manufacturerFlat Face Flange
ASME B16.5 · EN 1092-1 (Type A facing)
View productOEM manufacturerTongue and Groove Flange
ASME B16.5 · EN 1092-1 (facing Type C / Type D)
View productOEM manufacturerMale and Female Flange
ASME B16.5 · EN 1092-1 (facing Type E / Type F)
View productOEM manufacturerSwivel Ring Flange
Manufacturer standard / client drawing · ASME B16.5 / B16.47 (mating bolt pattern)
View productOEM manufacturerWeldoflange & Nipoflange
ASME B16.5 (flange end) · Manufacturer standard (body)
View productOEM manufacturerSAE J518 Hydraulic Flange
SAE J518-1 (Code 61) · SAE J518-2 (Code 62)
View productOEM manufacturerIBR Approved Flanges
Indian Boiler Regulations, 2026 · ASME B16.5
View productOEM manufacturerLarge Diameter Flanges
ASME B16.47 Series A · ASME B16.47 Series B
View productOEM manufacturerEN 1092-1 / DIN Flanges
EN 1092-1:2018 · EN 10222 (forgings)
View productTechnical data sheets
Dimensional standards
Documentation
What you receive with every order
- Hard-stamped heat number
- EN 10204 3.1 mill test certificate
- Dimensional inspection report against the governing standard
- Packing list with heat numbers
- Third-party inspection on request
- Seaworthy wooden cases for export orders
Flanges by material
Complete Flange Dimensions
ASME B16.5 Class 150–2500, B16.47 A / B, B16.36, EN 1092-1, facings, weights, P-T ratings, studs and gaskets · A4 book · 56 pages
DownloadReference book · PDFComplete Piping Dimension Catalogue
Pipes, flanges, fittings, olets, bolting, gaskets, plates and structurals, P-T ratings, alloy chemistry and mechanicals · A4 book · 103 pages
DownloadFAQ
Industrial Flanges: common questions
Which flange types does Teshi Group manufacture?
Weld neck, slip-on, blind, socket weld, threaded and lap joint flanges to ASME B16.5 from NPS ½" to 24", and large-diameter weld neck and blind flanges to ASME B16.47 Series A and B from NPS 26" to 60". Non-standard flanges are made to drawing.
What materials are your flanges forged in?
Carbon steel ASTM A105 and A350 LF2, stainless steel A182 F304, F304L, F316, F316L and F321, and alloy steel A182 F11, F22 and F91. Other grades are quoted on request.
What documents are supplied with flanges?
A mill test certificate to EN 10204 3.1 with chemistry, mechanical properties and heat treatment, a dimensional inspection report, and any NDT or third-party inspection release required by the order.
Can you supply flanges with IBR certification?
Yes. Teshi Group is IBR approved, and flanges for boiler and steam service are supplied with IBR certification when specified.
What is the difference between ASME B16.5 and ASME B16.47?
ASME B16.5 covers flanges from NPS ½" to 24". ASME B16.47 covers NPS 26" to 60" in two dimensionally different series: Series A (formerly MSS SP-44), which is heavier, and Series B (formerly API 605), which is more compact.
What facing types are available?
Raised face (RF), flat face (FF) and ring-type joint (RTJ) are standard. Other facings, such as tongue-and-groove or male-female, are machined to drawing.
Can you supply the complete joint?
Yes. Flanges can be supplied with matching gaskets and stud bolts cut to the correct length for the flange size, class and facing, on the same order.
Need a size or grade not listed here?
Our engineering team manufactures against your specific drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationQuick RFQ
