Why Buyers Source 4D Bend Pipe Fittings From Ganpat Industrial ?
True 4 × NPS Radius
Every 4D Bend formed to the exact R=4D centerline geometry, dimension-checked before it leaves the shop floor
15° To 180° On Demand
90, 45, 60 & custom-angle 4D Bend supplied in both seamless and welded construction
NPS 2″ To 24″ Range
DN50 to DN600 stocked across Carbon, Alloy, Stainless & Duplex grades under one roof
Full-Length Radiography
Every induction-bent joint X-rayed, PWHT-logged and ovality-checked before packing
Fast Container Dispatch
Standard NPS & angle combinations of 4D Pipe Bend ship within days, not weeks
4D Bend Guide
- 1Product: 4D Pipe Bend / 4D Pipe Elbow • commonly asked for as a 4R Bend
- 2Size Range: NPS 2″ to 24″ • DN50 to DN600
- 3Bend Radius: R = 4 × NPS
- 4Bend Angle: 15°, 30°, 45°, 60°, 90° & 180° • custom degree on drawing
- 5Standard: ASME B16.9 • ASME B16.49 • MSS SP-75
- 6Construction: Seamless & Welded / ERW • hot-induction formed
Or call our Mumbai office: +91 22 6743 7134 • Ready-stock 4D Bend dispatch on standard radius & angle
Ganpat Industrial Corporation manufactures and exports 4D Pipe Bend fittings from Mumbai. Every 4D Bend is hot-induction formed on calibrated bending arms. Our 4D Pipe Bending process holds a tight, repeatable centerline radius. Each fitting follows ASME B16.9 4D Bend geometry, R equal to four NPS. A 4D Pipe Elbow gives designers a middle path between 3D and 5D. Our 90 Degree 4D Bend handles sharp direction changes on tight racks. A 45 Degree 4D Bend suits gentler angular offsets on process skids. The 60 Degree 4D Bend bridges layouts between 45 and 90 degrees. Engineers often call this a 4D Long Radius Elbow for smooth flow. Buyers commonly request the same fitting simply as a 4R Bend. For compact layouts, a 4D Short Radius Bend saves valuable spool length. Each 4D Buttweld Bend is radiographed and heat-treated before dispatch. A 4D Pipe Elbow order ships with full dimensional and NDT reports.
4D Bend
4D Bends Built To Outlast The Pipeline, Not Just Pass Inspection
Ganpat Industrial induction-bends 4D Pipe Bend, 4D Pipe Elbow and 4D Long Radius Elbow in Carbon Steel, Stainless Steel, Alloy Steel and Duplex grades – built to ASME B16.9 for cross-country pipelines, refineries and process plants shipped across India, the Middle East and Africa.
- ✓ISO 9001:2015
- ✓ISO 14001:2015
- ✓OHSAS 18001:2007
- ✓PED Certified
- ✓Petrofac Approved
ASME B16.9 4D Pipe Bend Manufacturer in India in Various Material and Grades At Lowest Price
4D Bend Specification
4D Buttweld Bend Material Standards
- API 5L Gr.B, X42–X80 PSL1/PSL2
- ASTM A860 WPHY 42–70
- ASTM A234 WPB/WPC/WP11/WP22/WP91
- ASTM A403 304/304L, 316/316L
4D Bend Material Grades
- Carbon Steel: WPB, WPC, A420 WPL6
- Alloy Steel: WP5, WP9, WP11, WP22, WP91
- Stainless Steel: 304/304L, 316/316L, 321
- Duplex & Super Duplex: S31803, S32205, S32750
4R Bend Outer Diameter Range
- 2″ – 24″
- DN50 – DN600
- Custom O.D. On Drawing
ASME B16.9 4D Bend Angle Range
- 45° Bend
- 60° Bend
- 90° Bend
- Customized Angle On Request
4D Pipe Elbow Wall Thickness
- SCH 10, SCH 40, SCH STD
- SCH 80, SCH XS
- SCH 160, SCH XXS
90 Degree 4D Bend Surface Coatings
- Black Paint
- Galvanized
- Epoxy Coated
- 3PE / FBE
Material & Grades of 4D Pipe Bend
| Material & Grades of 4D Pipe Bend | Specifications / Grades |
|---|---|
| Carbon Steel 4D Pipe Bend | ASTM A234, ASME SA234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPHY 60, WPHY 65 & WPHY 70. |
| Alloy Steel 4D Pipe Bend | ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91 |
| Low Temperature Carbon Steel 4D Pipe Bend | ASTM A420 WPL3, A420 WPL6 |
| Duplex & Super Duplex Steel 4D Pipe Bend | ASTM A 815, ASME SA 815 UNS NO S31803, S32205. UNS S32750, S32950. Werkstoff No. 1.4462 |
| Stainless Steel 4D Pipe Bend | ASTM A403 WP316/316L, ASTM A403 SA / A 774 WP-S, WP-W, WP-WX 304/304L, ASTM A182 F316L, 304L, DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404 |
| Nickel Alloy 4D Pipe Bend | ASTM B336, ASME SB336, Nickel 200 (UNS No. No2200), 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), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, CuNi30Mn1Fe. |
Ready To Order 4D Pipe Bend In Bulk?Share your NPS, angle & grade – get a factory-price quote within 24 hours.
Supply American Origin 4D Long and Short Radius Elbow Stock Online With SCH 10 to SCH XXS
ASME B16.9 4D Bend Dimension Chart
| NPS | Bevel O.D. D |
Center-to-End C M |
||||
|---|---|---|---|---|---|---|
| Diameter Nominal | Inches | Ser. B | Ser. A | C | M | |
| 25 | 1 | 32 | 33.7 | 38 | ||
| 400 | 16 | 426 | 406.4 | 305 | ||
| 50 | 2 | 57 | 60.3 | 64 | ||
| 950 | 38 | – | 965 | 711 | ||
| 80 | 3 | 89 | 88.9 | 86 | ||
| 1050 | 42 | – | 1067 | 762 | 711 | |
| 150 | 6 | 159 | 168.3 | 143 | ||
| 450 | 18 | 478 | 457.2 | 343 | ||
| 1200 | 48 | 1220 | 1220 | 889 | 838 | |
| 300 | 12 | 325 | 323.9 | 254 | ||
| 850 | 34 | – | 864 | 635 | ||
| 65 | 21/2 | 76 | 76.1(73) | 76 | ||
| 200 | 8 | 219 | 219.1 | 178 | ||
| 90 | 31/2 | – | 101.6 | 95 | ||
| 500 | 20 | 529 | 508.0 | 381 | ||
| 700 | 28 | 720 | 711 | 521 | ||
| 800 | 32 | 820 | 813 | 597 | ||
| 20 | 3/4 | 25 | 26.9 | 29 | ||
| 32 | 11/4 | 38 | 42.4 | 48 | ||
| 600 | 24 | 630 | 610 | 432 | ||
| 100 | 4 | 108 | 114.3 | 105 | ||
| 1100 | 44 | 1120 | 1118 | 813 | 762 | |
How 4D Pipe Elbow Radius & Tangent Length Is Calculated ?
- 1Radius (R): R = 4 × NPS – the formula fixing every 4D Bend order
- 290° Center-to-End: equals R directly
- 345° Center-to-End: R × tan(22.5°) ≈ 0.4142 × R
- 4Minimum Intrados Thickness: per ASME B16.49 Eq.1, based on R/Do ratio & nominal wall t
- 5Tangent Length: straight run left at each end for field weld fit-up, typically 150–300 mm
- 6Tolerance Band: Radius ±1% • Bend angle ±0.5° • Bend plane ±1°
4D Bend vs 5D Bend
4D Pipe Bend
- Radius R = 4 × NPS
- Balanced footprint for congested racks
- Moderate-to-low pressure drop
- Induction or cold formed
5D Pipe Bend
- Radius R = 5 × NPS
- Longer footprint, open layouts
- Lowest pressure drop
- Always induction formed
Types Of 4D Bends
ASME B16.9 4D Pipe Bend
ASME B16.9
4D Seamless Pipe Bend
MSS SP-75
4D Welded Pipe Bend
ASME B16.9
4D Long Radius Elbow
ASME B16.49
4D Short Radius Bend
ASTM A403
90 Degree 4D Bend
ASME B16.9
45 Degree 4D Bend
ASME B16.9
60 Degree 4D Bend
ASME B16.49
Weekly Delivery Of 4D Bend In Below Countries
| Export to | Continent | Shipping Time |
|---|---|---|
| UAE | Middle East | 6 Days |
| Saudi Arabia | Middle East | 10 Days |
| Oman | Middle East | 7 Days |
| Kuwait | Middle East | 8 Days |
Buying 4D Bend In Bulk For A Pipeline Project?Send your BOQ – factory price, MTC 3.1, dispatch within days.
90 Degree 4D Bending Process
A specialist 4D Bend supplier in India delivering fittings with consistent radius accuracy and joint integrity.
1. Mother Pipe Selection
Seamless or welded pipe matched to grade, wall thickness & heat number.
2. Induction Heating Band
A narrow section is raised to forming temperature via an induction coil.
3. Guided Arm Push
A bending arm advances the heated band along the fixed 4D radius arc.
4. Trailing Quench Ring
A water ring cools the pipe immediately behind the heated zone.
5. Post-Bend Heat Treatment
Normalize / quench & temper / stress relieve as per grade & code.
6. NDT & Dimension Check
Radiography, ovality, wall-thinning & radius verification.
Weight Chart Of 45 Degree 4D Bend
| Size | Wall Thickness | Bending Radius | Approx. Weight in kg | ||||
|---|---|---|---|---|---|---|---|
| DN | Outside Diameter | s | a | e | 45 degree | 90 degree | |
| inch | Millimeter | ||||||
| Seamless | |||||||
| 3 | 80 | 89 | 2 | 82.5 | 34 | 00.32 | 00.64 |
| 20 | 500 | 508 | 5 | 508 | 210 | 28.10 | 56.20 |
| 1 | 25 | 30 | 1.5 | 30 | 12 | 00.03 | 00.05 |
| 16 | 400 | 419 | 4 | 400 | 166 | 16.40 | 32.80 |
| 28 | 700 | 711 | 6 | 711 | 295 | 66.00 | 132.00 |
| 2 | 50 | 57 | 1.5 | 52.5 | 22 | 00.10 | 00.20 |
| 12 | 300 | 324 | 4 | 305 | 126 | 8.55 | 17.10 |
| 18 | 450 | 457 | 4.5 | 457 | 189 | 20.45 | 40.90 |
| 4 | 100 | 108 | 2.5 | 100 | 41 | 00.58 | 1.16 |
| 7 | 175 | 194 | 3 | 180 | 75 | 1.90 | 3.80 |
| 32 | 800 | 813 | 6 | 813 | 337 | 86.50 | 173.00 |
| 36 | 900 | 914 | 8 | 914 | 379 | 145.50 | 291.00 |
| 10 | 250 | 267 | 3 | 255 | 106 | 4.44 | 8.88 |
| 6 | 150 | 159 | 2.5 | 150 | 62 | 1.30 | 2.60 |
| 24 | 600 | 610 | 5 | 610 | 253 | 40.50 | 81.00 |
| 1¼ | 32 | 38 | 1.5 | 32.5 | 14 | 00.03 | 00.08 |
| 1½ | 40 | 44.5 | 1.5 | 40 | 17 | 00.06 | 00.14 |
| 8 | 200 | 219 | 3 | 210 | 87 | 3.00 | 6.00 |
| 2½ | 65 | 76 | 2 | 70 | 29 | 00.23 | 00.46 |
| 14 | 350 | 368 | 4 | 352.5 | 146 | 11.30 | 22.60 |
| 5 | 125 | 133 | 2.5 | 125 | 52 | 00.90 | 1.80 |
Need 4D Bend To Your Grade Or Wall Schedule?Send drawing or MTO – factory price within 24 hours.
HSN Code Of 4D Long Radius Elbow
HSN Heading
7307
Tube or pipe fittings of iron or steel
4D Bend Sub-Heading
7307 93 90
Butt welding fittings, other
GST Rate
18%
Standard rate on steel pipe fittings
Typical MOQ
No Minimum
Trial lots to full container loads
Application Of 60 Degree 4D Bend
Off-Shore Oil Drilling Platforms
Power Generation Piping
Petrochemical & Refinery Units
Gas Processing & LNG Terminals
Pharmaceutical Process Skids
Heat Exchanger & Condenser Lines
Pulp, Paper & Specialty Chemicals
Structural Frames & Handrail Fabrication
Testing Of 4R Bend
Mill Test Certificate 3.1
Chemistry & mechanical results traced to heat number
Every Order
Radiography & Dimension Report
Radius, ovality & wall-thinning check on every 4D Bend
Every Order
Post-Bend Heat Treatment Chart
Time-temperature record for normalize / PWHT cycle
On Request
Certificate Of Origin
For customs clearance & import duty processing
Export Orders
Surface Treatment Of 4D Buttweld Bend
Coating Type
Galvanized
Zinc-coated for corrosion resistance
Coating Type
FBE Coated
Fusion bonded epoxy, buried pipeline duty
Coating Type
3PE Coated
Three-layer polyethylene, underground lines
Coating Type
Epoxy Coated
Chemical & abrasion resistant finish
Monthly Delivery Of 4D Bend In Below Countries
| Export to | Continent | Shipping Time |
|---|---|---|
| Nigeria | Africa | 20 Days |
| Algeria | Africa | 18 Days |
| Iraq | Middle East | 12 Days |
| USA | North America | 38 Days |
4D Pipe Elbow Tolerance
As a 4D Bend supplier in India, we dimension-check every bend to ASME B16.49 limits.
Radius Tolerance
±1%
On the specified R = 4 × NPS value
Bend Angle Tolerance
±0.5°
Checked at both tangent ends
Max Ovality
5–8%
Of nominal O.D. at extrados / intrados
Max Wall Thinning
12.5%
At extrados, per ASME B16.49 Eq.1
Min Intrados Thickness
≥ t nom.
No thinning allowed below nominal wall on intrados
Bend Plane Tolerance
±1°
Deviation from the specified bend plane
Straightness (Tangent)
≤ 3 mm/m
On straight tangent length at each end
Surface Check
No Wrinkles
Visual & MPI check on the compression side
Chemical Composition Of 4D Buttweld Bend
ASTM A234 WPB
- Carbon (C): ≤ 0.30%
- Manganese (Mn): 0.29–1.06%
- Phosphorus (P): ≤ 0.05%
- Sulphur (S): ≤ 0.045%
- Silicon (Si): ≥ 0.10%
ASTM A860 WPHY 65
- Carbon (C): ≤ 0.26%
- Manganese (Mn): 1.40–1.75%
- Phosphorus (P): ≤ 0.030%
- Sulphur (S): ≤ 0.030%
- Carbon Equivalent (CE): ≤ 0.43
ASTM A403 WP304L
- Carbon (C): ≤ 0.030%
- Chromium (Cr): 18–20%
- Nickel (Ni): 8–12%
- Manganese (Mn): ≤ 2.0%
- Corrosion Resistant Grade
ASTM A234 WP91
- Carbon (C): 0.08–0.12%
- Chromium (Cr): 8–9.5%
- Molybdenum (Mo): 0.85–1.05%
- Vanadium (V): 0.18–0.25%
- High-Temperature Service Grade
Mechanical Properties Of ASME B16.9 4D Bend
A234 WPB Yield
35 ksi
241 MPa Min
WPHY 65 Yield
65 ksi
448 MPa Min
WPB Tensile
60–85 ksi
415–585 MPa
Elongation
20–30%
Grade Dependent
4D Bend Packing & Shipping
Being a leading 4D Bend manufacturer in India, we ensure safe, damage-free export packing.
Individually Wrapped
Each 4D Bend end-capped & wrapped in VCI paper to prevent transit rust
Bundled By Size & Heat
Strapped bundles grouped by NPS, angle & heat number for easy site sorting
Fumigated Wooden Crating
ISPM-15 certified crates for larger NPS & long-radius 4D Bend pieces
Container Load Planning
Radius-aware stacking plan to maximize FCL utilization & prevent point-loading
Packing List & Photos
Pre-shipment packing list, weight slip & loading photos shared before dispatch
Need 4D Bend Test Certificates For Your Project?MTC 3.1, RT report & COO issued on every export order.
FAQ On 4D Pipe Bend
What does 4D mean in a 4D Bend?
It means the centerline bend radius equals 4 times the Nominal Pipe Size (NPS) of the pipe being formed.
How is a 4D Bend different from a 3D or 5D Bend?
A 4D Bend sits between the two – it gives a smoother flow path than a 3D Bend and a more compact footprint than a 5D Bend.
Is a 4D Bend the same as a 4R Bend?
Yes, 4R Bend and 4D Pipe Bend are trade terms for the same fitting – a bend radius equal to 4 times NPS.
Which standard governs 4D Bend dimensions?
ASME B16.9 sets the base butt-welding fitting rules, while ASME B16.49 and MSS SP-75 cover induction-bend geometry for the 4D radius.
What is the minimum order quantity for a 4D Bend?
Ganpat Industrial supplies from trial lots to full container loads – there is no fixed minimum on standard NPS & angle combinations.
We Collaborate With Traders in the Following Locations
| Regions | Country |
|---|---|
| South America | Brazil, Argentina, Colombia |
| East Asia | China, Japan, South Korea |
| Melanesia | Fiji, Papua New Guinea |
| Middle East | Saudi Arabia, Iran, Iraq |
| North America | USA, Canada, Mexico |
| West Africa | Nigeria, Ghana, Senegal |
| South Carolina | USA |
| East Africa | Kenya, Ethiopia, Tanzania |
| North Africa | Egypt, Morocco, Algeria |
| South Asia | India, Pakistan, Bangladesh |
6 Reasons to choose Ganpat Industrial Corporation
- Distributor of Heat Exchanger parts and Alloys for High Temperature applications.
- Stockholder and importer of Ferrous and non ferrous metals.
- Wide stock of prime quality austenitic and Ferritic Stainless Steel for Extreme pressure environment.
- Marine grade steel at lowest price in Mumbai.
- Compare Price per KG in India and China.
- Offer Resale price to local suppliers, traders and wholesalers in UAE, Saudi Arabia, Egypt, and USA