ASME SA 778 TP316L Pipe and ASTM A778 TP304L ERW Tube Manufacturer, Supplier, and Exporter in India

Mcneil Instrument is a prominent supplier based in Mumbai, offering ASTM A778 stainless steel tubing tailored for applications with low to moderate temperatures. The ASTM A778 specification governs the supply of unannealed, welded stainless steel tubing, encompassing various grades to suit diverse needs. Among these, the ASTM A778-304L stands out as a widely utilized option, characterized by its low carbon variant of the 18/8 chromium nickel stainless steel. This composition grants enhanced corrosion resistance and strength, coupled with improved ductility and welding properties owing to the reduced carbon content.

Similarly, Mcneil Instrument provides the ASTM A778 TP316L, another pivotal grade featuring a low carbon version of the 316 chromium nickel molybdenum austenitic stainless steel. Offering comparable strength to the 304L variant, the TP316L exhibits heightened corrosion resistance, courtesy of the added 4% molybdenum in its composition. Such enhanced resistance renders it particularly suitable for applications involving chloride-rich environments, including marine settings and food-grade applications.

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Mcneil Instrument’s inventory encompasses tubing in various pressure ratings, diameters, and sizes, with outer diameters spanning from ¼ inches to 60 inches, depending on specific requirements and standards. Production types vary, ranging from welded tubes to seamless, cold drawn, or hot rolled variants, catering to diverse application needs. Additionally, Mcneil Instrument offers tubing with threaded, beveled, or plain ends, ensuring compatibility with a wide array of systems and installations.

It’s important to note that materials supplied by Mcneil Instrument cannot undergo annealing or heat treatment for hardening purposes, as per the specifications outlined in ASTM A778.

ASTM A778 Stainless Steel Pipe standard specification

 

Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular

Tube Sizes3 In (75 mm) To 48 In (1200 Mm) Od – 0.062 In (1.5 Mm) To 0.5 In (12.5 Mm) Wall Thickness
Grades
  • ASTM A778 TP304L
  • ASTM A778 TP316L
  • ASTM A778 TP317L
  • ASTM A778 TP321
  • ASTM A778 TP347
Length10 Ft (3 M) Lengths Or Over.
Length TolerancesNo Tube Shall Be More Than 0.25 In (6 Mm) Over That Specified. No Tube Shall Be Shorter Than Specified.
Straightness0.25 In (6 Mm) Max Deviation From 10 Ft (3 M) Straight Edge.

Mcneil Instrument offers ASTM A778 pipes, ideal for small bore thin-walled piping applications, and ASTM A312 pipes, designed for larger bore and higher pressure systems. Both ASTM A778 and A312 pipes are available in various schedules including 5S, 10S, 40S, 80S, STD, and XS, providing options for different wall thicknesses (WT). Mcneil Instrument’s fabrication capabilities excel particularly in ASTM A778 pipes, ensuring superior quality compared to ASTM A312.

ASTM A778 Welded Tubing Tolerances

Mcneil Instrument, an authorized supplier, is accredited by PED for ASTM A778 Grade 304 Tubing in Mumbai. Explore their inventory for available sizes and stock lists across India.

 

NPSOutside Diameter (OD)1Wall Thickness(t)2Ovality3 t< 3%OD
UnderOverUnderOver
inmminmm%%%
1/2to 11/20.0310.80.0150.412.512.51.5
>11/2 to 40.0310.80.0310.812.512.51.5
>4 to 80.0310.80.0621.612.512.51.5
>8 to 120.0310.80.0932.412.512.51.5
>12 to 180.0310.80.0932.412.512.51.5
>18 to 260.0310.80.1253.212.512.51.5
>26 to 340.0310.80.1564.012.512.51.5
>34 to 480.0310.80.1874.812.512.51.5

Schedule 5S ASTM A778 Welded Pipe

Nominal
Pipe
Size
Inches
Diameter, Inches
Wall
Thickness
Inches
Weight
Lbs./Ft.
Type
304L
Type
316L
OD
ID
3
3.500
3.334
.083
3.029
X
X
4
4.500
4.334
.083
3.915
X
X
5
5.563
5.345
.109
6.349
X
X
6
6.625
6.407
.109
7.585
X
X
8
8.625
8.407
.109
9.914
X
X
10
10.750
10.482
.134
15.190
X
X
12
12.750
12.438
.156
21.070
X
X

ASTM A778 Welded Stainless Tubes Sizes, Dimensions and Weight Chart

OD Size
Inches
BW
Ga.
Wall
Thickness
Inches
ID Size
Inches
Approx.
Weight
Lbs/Ft.
Type
304L
Type
316L
3
14
.078
2.844
2.434
X
X
12
.109
2.782
3.365
X
X
11
.125
2.750
3.838
X
X
4
14
.078
3.844
3.267
X
X
12
.109
3.782
4.530
X
X
11
.125
3.750
5.173
X
X
5
14
.078
4.844
4.100
X
X
12
.109
4.782
5.694
X
X
11
.125
4.750
6.508
X
X
6
14
.078
5.844
4.933
X
X
12
.109
5.782
6.858
X
X
11
.125
5.750
7.843
X
X
8
14
.078
7.844
6.599
X
X
12
.109
7.782
9.186
X
X
11
.125
7.750
10.513
X
X
10
14
.078
9.844
8.265
X
X
12
.109
9.782
11.514
X
X
11
.125
9.750
13.183
X
X
12
14
.078
11.844
9.932
X
X
12
.109
11.782
13.842
X
X
11
.125
11.750
15.853
X
X

Schedule 10S ASTM A778 Stainless Welded Pipe

Nominal
Pipe
Size
Inches
Diameter, Inches
Wall
Thickness
Inches
Weight
Lbs./Ft.
Type
304L
Type
316L
OD
ID
3
3.500
3.260
.120
4.332
X
X
4
4.500
4.260
.120
5.613
X
X
5
5.563
5.295
.134
7.770
X
X
6
6.625
6.357
.134
9.289
X
X
8
8.625
8.329
.148
13.400
X
X
10
10.750
10.420
.165
18.700
X
X
12
12.750
12.390
.180
24.160
X
X

ASTM A778 Stainless Steel Welded Tubes Equivalent

Welding unannealed austenitic stainless steel tubular products GradeASTM StandardArea
A778 S34700ASTM A778America
A778 S31703ASTM A778America
A778 Grade Type 321ASTM A778America
A778 S30403ASTM A778America
A778 S32100ASTM A778America
A778 Grade Type 347ASTM A778America
A778 S31603ASTM A778America
A778 Grade Type 304LASTM A778America
A778 Grade Type 317LASTM A778America
A778 Grade Type 316LASTM A778America

A778 chemical composition

GradeUNSCarbon max BManganese,
max		PH,
max		Composition, %TiColumbium Plus TantalusN
max
Sulfur,
max		Silicon,
max		ChromiumNickel
TP 304LS304030.0302.000.0450.0301.0018.0–20.08.0–13.0………0.10
TP 316LS316030.0302.000.0450.0301.0016.0–18.010.0–14.02.00
3.00		……0.10
TP 317LS317030.0302.000.0450.0301.0018.0–20.011.0–15.03.0
4.0		……0.10
TP 321S321000.082.000.0450.0301.0017.0–19.09.0–12.0…C……
TP 347S347000.082.000.0450.0301.0017.0–19.09.0–12.0……D…

Requirement of ASTM A778 Pipe Mechanical Testing

TestUnitedASTM
FlareRequiredNot Required
FlattenRequiredRequired
Reverse BendRequiredNot Required
Eddy CurrentRequiredNot Required
Transverse
TensionRequiredRequired

ASTM A778 Pipe Tensile Strength

GradeUNSTensile Strength minYield Strength minElongation in 2 in (50 mm) min
ksiMPaksiMPa%
TP304LS30403704852517040
TP316LS31603704852517040
TP317LS31703755153020535
TP321S32100755153020540
TP347S34700755153020540
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