ASTM A778 Stainless Steel Welded Tubes

ASME SA 778 TP316L Pipe and ASTM A778 TP304L ERW Tube manufacturer in India

ASTM A778 Austenitic Stainless Steel Welded Tubing supplier in Mumbai. View equivalent, specification and price list

ASTM A778 stainless steel pipe is used in low to moderate temperature applications. The specification is for unannealed, welded stainless steel materials. There are different grades of materials used under this specification. The ASTM A778-304l is one of the most used materials. It is a low carbon variation of the 18/8 chromium nickel stainless steel. The chromium nickel composition provides better corrosion resistance and strength while the less carbon content provides ductility and better welding properties. the ASTM A778 tp316l is a low carbon version of the 316 chromium nickel molybdenum austenitic stainless steel. This has equal strength to the 304L material but with increased corrosion resistance. The added 4% molybdenum in the composition provides corrosion resistance against chloride iron rich media. So the ASTM A778 316l is preferred for use in sea water, marine and in food grade applications. The tubes come with different pressure ratings, diameters and sizes. The outer diameter and the wall thickness of the pipes account for the different schedules and pressure ratings. The ASTM A778 tp304l can come in outer diameters ranging from ¼ inches to 60 inches depending on the specification, standards and application requirements. The production type can vary such as the ASTM A778 stainless steel Welded Tubes, seamless tubes, cold drawn or hot rolled tubes. There are also threaded, beveled and plain tubes. The material cannot be annealed or heat treated for hardening.

ASTM A778 Stainless Steel Pipe standard specification

Manufacturer & supplier of ASTM A778 TP316L EFW Pipe and Tube as per ASME B36.19 Standard

Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular

Tube Sizes 3 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
Length 10 Ft (3 M) Lengths Or Over.
Length Tolerances No Tube Shall Be More Than 0.25 In (6 Mm) Over That Specified. No Tube Shall Be Shorter Than Specified.
Straightness 0.25 In (6 Mm) Max Deviation From 10 Ft (3 M) Straight Edge.
Where we export? Singapore, Malaysia, UAE, UK, Saudi Arabia / KSA, South Africa

ASTM A312 Vs ASTM A778

  • A778 is suitable for small bore thin walled piping applications and A312 is used for large bore and higher pressure
  • ASTM A778 and A312 Pipes are available in schedule 5S, 10S, 40S, 80S, STD and XS in wall thickness (WT)
  • A778 Fabrication is better compared to ASTM A312

Types of ASTM A778 Stainless Steel Pipe and Tube

Check the difference between ASTM A778 Pipe and A312 material, buy directly from ASTM A778 Stainless Steel Welded Tubes manufacturers in India for best price & quality.

ASTM A778 Stainless Steel Pipe

ASTM A778 Stainless Steel Pipe

ASTM A778-304L

ASTM A778-304L

ASTM A778 TP316L

ASTM A778 TP316L

ASTM A778 316L

ASTM A778 316L

ASTM A778 TP304L

ASTM A778 TP304L

ASTM A778 Stainless Steel Welded Tubes

ASTM A778 Stainless Steel Welded Tubes

ASTM A778 Welded Tubing Tolerances

PED approved ASTM A778 Grade 304 Tubing supplier in Mumbai, check available sizes and stock list in India

NPS

Outside Diameter (OD)1

Wall Thickness(t)2

Ovality3 t< 3%OD

Under

Over

Under

Over

in

mm

in

mm

%

%

%

1/2to 11/2

0.031

0.8

0.015

0.4

12.5

12.5

1.5

>11/2 to 4

0.031

0.8

0.031

0.8

12.5

12.5

1.5

>4 to 8

0.031

0.8

0.062

1.6

12.5

12.5

1.5

>8 to 12

0.031

0.8

0.093

2.4

12.5

12.5

1.5

>12 to 18

0.031

0.8

0.093

2.4

12.5

12.5

1.5

>18 to 26

0.031

0.8

0.125

3.2

12.5

12.5

1.5

>26 to 34

0.031

0.8

0.156

4.0

12.5

12.5

1.5

>34 to 48

0.031

0.8

0.187

4.8

12.5

12.5

1.5

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 Grade ASTM Standard Area
A778 S34700 ASTM A778 America
A778 S31703 ASTM A778 America
A778 Grade Type 321 ASTM A778 America
A778 S30403 ASTM A778 America
A778 S32100 ASTM A778 America
A778 Grade Type 347 ASTM A778 America
A778 S31603 ASTM A778 America
A778 Grade Type 304L ASTM A778 America
A778 Grade Type 317L ASTM A778 America
A778 Grade Type 316L ASTM A778 America

A778 chemical composition

Grade
UNS
Carbon max B
Manganese,
max
PH,
max
Composition, % Ti
Columbium Plus Tantalus
N
max
Sulfur,
max
Silicon,
max
Chromium
Nickel
TP 304L
S30403
0.030
2.00
0.045
0.030
1.00
18.0–20.0
8.0–13.0
...
...
...
0.10
TP 316L
S31603
0.030
2.00
0.045
0.030
1.00
16.0–18.0
10.0–14.0
2.00
3.00
...
...
0.10
TP 317L
S31703
0.030
2.00
0.045
0.030
1.00
18.0–20.0
11.0–15.0
3.0
4.0
...
...
0.10
TP 321
S32100
0.08 
2.00
0.045
0.030
1.00
17.0–19.0
9.0–12.0
...
C
...
...
TP 347
S34700
0.08 
2.00
0.045
0.030
1.00
17.0–19.0
9.0–12.0
...
...
D
...

Requirement of ASTM A778 Pipe Mechanical Testing

Test United ASTM
Flare Required Not Required
Flatten Required Required
Reverse Bend Required Not Required
Eddy Current Required Not Required
Transverse    
Tension Required Required

ASTM A778 Pipe Tensile Strength

Grade

UNS

Tensile Strength min

Yield Strength min

Elongation in 2 in (50 mm) min

ksi

MPa

ksi

MPa

%

TP304L

S30403

70

485

25

170

40

TP316L

S31603

70

485

25

170

40

TP317L

S31703

75

515

30

205

35

TP321

S32100

75

515

30

205

40

TP347

S34700

75

515

30

205

40