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.
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 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 |
|
| 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. |
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.
| 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 |