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Inconel Pipe Fittings

Inconel Pipe Fittings

What are Inconel Pipe Fittings?

Industrial applications like petrochemical processing, pollution control, and nuclear reactors get subjected to extreme temperatures and abrasive agents. Inconel pipe fittings can operate under these conditions due to their unique chemical composition: “superalloys” of nickel and chromium. They may also contain molybdenum and niobium – for example, Alloy 625.

High-temperature tolerance, corrosion resistance, and creep resistance make Inconel 600 pipe fittings suitable for roller hearth ovens, gas turbines, condenser tubes, and space craft. They contain about 72% nickel with sizable percentages of chromium and iron (16 and 8%).

Manufacturers produce these components in different sizes and designs, for example, an ASTM B366 Inconel 601 pipe bend.


Specification of inconel pipe fittings


Inconel Pipe Fittings Specification

Delivery Schedules of ASTM B366 Inconel 600 Butt Welded Fittings


Country Name Oman Qatar Israel Saudi Arabia Egypt
Delivery Time 7-8 8-10 12-15 8-10 Days 11-13

Manufacturer of Alloy 600 Elbow in India, Check Dimensions Here

Dimensions of Inconel Metal Elbow


Inconel elbow dimensions

Nominal fittings sizes End to end OD
(inch) D A B
1 1/4 x 1/2 51 42.02 21.03
1 x 3/4 51 33.04 26.07
1 1/4 x 3/4 51 42.02 26.07
3/4 x 1/2 38 26.07 21.03
1 1/4 x 1 51 42.02 33.04
1 1/2 x 1 1/2 64 48.03 42.02
1 1/2 x 1/2 64 48.03 21.03
1 1/2 x 1 64 48.03 33.04
1 1/2 x 3/4 64 48.03 26.07
2 x 1 1/2 76 60.03 48.02
2 x 1 76 60.03 33.04
2 x 1 1/4 76 60.03 42.02
2 x 3/4 76 60.03 26.07
3/4 x 3/8 38 26.07 17.01
2 1/2 x 1 1/2 89 73 48.03
2 1/2 x 2 89 73 60.03
1 x 1/2 51 33.04 21.03
2 1/2 x 1 1/4 89 73 42.02
3 x 2 1/2 89 88.09 73
2 1/2 x 1 89 73 33.04
3 x 2 89 88.09 60.03
3 x 1 1/4 89 88.09 42.02
3 x 1 1/2 89 88.09 48.03
5 x 3 1/2 127 141.03 101.06
3 1/2 x 2 102 101.06 60.03
3 1/2 x 21/2 102 101.06 73
3 1/2 x 3 102 101.06 88.09
4 x 3 1/2 102 114.03 101.06
3 1/2 x 1 1/4 102 101.06 42.02
4 x 3 102 114.03 88.09
3 1/2 x 1 1/2 102 101.06 48.03
4 x 2 102 114.03 60.03
4 x 2 1/2 102 114.03 73
4 x 1 1/2 102 114.03 48.03
5 x 4 127 141.03 114.03
5 x 3 127 141.03 88.09
5 x 2 127 141.03 60.03
5 x 2 1/2 127 141.03 73
6 x 5 140 168.03 141.03
6 x 3 140 168.03 88.09
6 x 4 140 168.03 114.03
6 x 3 1/2 140 168.03 101.06

Get HIC tested ASTM B366 UNS N06600 Buttweld Fittings in Custom Sizes, Find Pipe Bend Sizes Below

ASTM B366 UNS N06600 Pipe Bend Types and Sizes


Types Sizes & standard
  • L bend
  • Mitered pipe bend
  • 22d pipe bend
  • 10d pipe bend
  • 5d pipe bend
  • 3d pipe bend
  • Hot induction bend
  • Piggable bend
  • Seamless pipe bend
  • J bend
  • Long radius bend
  • Welded pipe bend
  • Short radius bend
  • Return bend
  • 1/2” to 60” (OD)
  • DN15 – DN 1500
  • ASME B16.49
  • ASME B16.9

What are the common non-destructive testing methods used for Inconel pipe fittings and Alloy 600?

Precise testing is imperative for fittings like an ASTM B366 UNS N06600 elbow because of their high-stake applications. For instance, sour services mandate a maximum hardness of 22 HRC or 237 HB for Alloy 625. Non-destructive testing methods (NDT) can effectively diagnose defects in an Inconel tee that may affect the performance and safety of the application.

The typical NDT tests are Positive material identification or PMI, radiography, and ultrasonic testing. Nickel 600 end cap buyers can also request dye penetration testing, hydrostatic assessment, or magnetic particle inspection.

An Inconel elbow often gets tested through Eddy Current or UT exams when accessibility is a concern. You may demand greater accuracy than radiography can provide.

Types of Inconel Alloy Buttweld Fittings


Inconel 600 Cap

Inconel 600 Cap

Inconel Elbow

Inconel Elbow

Alloy 600 Tee

Alloy 600 tee

UNS N06600 Reducer

UNS N06600 reducer

Inconel Metal Tee in SCH 10, SCH 20, SCH 40, SCH 60, SCH 80 and SCH 160 as per ASME B16.9 Standard, View Tolerance

Tolerance of ASME SB 366 BW Fittings


Outside diameter
at bevel (D)
+ 1.06
- 0.08
1.06 1.06 + 2.04
- 1.06
Nominal pipe size 10 to 18 20 to 24 26 to 30 32 to 48
Center to end LR (A/B) 2 2 2 2
Nominal pipe size 1/2 to 2½ 3 to 3½ 4 5 to 8
Outside diameter
at bevel (D)
+ 4
- 3.02
+ 6.04
- 4.08
+ 6.04
- 4.08
+ 6.04
- 4.08
Center to end 3D (A/B) 3 3 6 6
Inside diameter at end 3.02 4.08 + 6.04
- 4.08
+ 6.04
- 4.08
Center to end LR (A/B) 2 2 3 5
Center to end 3D (A/B) 3 3 3 3
Inside diameter at end 0.08 1.06 1.06 1.06

How resistant are Inconel Pipe Fittings to corrosion and oxidation?

Above-par resistance to corrosion is a prominent trait of Inconel buttweld fittings. They can resist acids like nitric, phosphoric, sulfuric, hydrochloric, etc, and seawater. In fact, they often operate in evaporators used for phosphoric acid in wet processes.

An Inconel 600 stub end does not undergo oxidation even at severe temperatures: from cryogenic to 980°C or 1800°F.

Besides, these fittings show top-notch handling of high pressures and mechanical loads. The only flipside is that an Inconel reducer can be expensive and challenging to machine. High-speed and powerful cutting tools may be required, leading to more heat generation.

Find ASME SB 366 Inconel Concentric / Eccentric Reducer Chemical Composition

ASTM B366 Seamless Pipe Fittings Chemical Composition


Grade C Mn Si S Cu Fe Ni Cr
Inconel 600 0.15 max 1.00 max 0.50 max 0.015 max 0.50 max 6.00 - 10.00 72.00 min 14.00 - 17.00
Inconel 601 0.10 max 1.0 max 0.5 max 1.0 max Balance 58.0 - 63.0 72.00 min 21.0 - 25.0
Inconel 625 0.10 max 0.50 max 0.50 max 0.015 max - 5.0 max 58.0 min 20.0 - 23.0
Inconel 718 0.08 max 0.35 max 0.35 max 0.015 max 0.30 max - 50.00 - 55.00 17.00 - 21.00
Get Inconel Alloy Welded Fittings in Bevelled, Plain Bevel and Compound Bevel End With MTC EN 10204 3.1/ 3.2 certificate, Check Properties

Alloy 601 Weld Fittings Mechanical Properties


Grade Tensile strength Density Elongation Melting point Yield strength(0.2% offset)
Inconel 600 PSi-95000, MPa-655 8.47 g/cm3 40% 1413°C(2580°F) PSi-45000, MPa-310
Inconel 601 PSi-80000, MPa-550 8.1 g/cm3 30% 1411°C(2571°F) PSi-30000, MPa-205
Inconel 718 PSi-1,35000, MPa-930 8.2 g/cm3 45% 1350°C(2460°F) PSi-75000, MPa-482

Inconel Butt Welding Fittings Equivalent Grade


STANDARD WNR UNS JIS BS AFNOR EN
Inconel 600 2.4816 N06600 NCF600 NA13 NC15FE11M NiCr15Fe
Inconel 601 2.4851 N06601 NCF601 NA49 NC23FeA NiCr23Fe

End Finishing Types of Inconel 600 Reducer


  • Grooved ends
  • Flanged ends
  • Threaded ends
  • Beveled ends
  • Squared ends