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Seamless Pipe

Penn Stainless Products stocks stainless steel Seamless pipe per ASTM A 312 in 304/304L and 316/316L. We supply other stainless grades, including 304H, 316H, 309/S, 310/S, 317/L, 321/H, 347/H, 904L, 330, 254SMO, 410. In duplex grades, we can supply 2205 and 2507. Some nickel grades are also supplied.

We supply a full range of pipe schedules ranging from Sch 5 thru Double Extra Heavy. Most products are available in 20′ random length sections, but Penn Stainless Products can supply stainless steel seamless pipe in most stainless grades in sections exceeding 40′. All stainless steel seamless pipes can be cut to your exact requirements. Some made to order items can be produced in 2-3 weeks.

Pipe and Tube Products
Product Variations
(Available)
(Call for Availability)
(Unavailable)
304/304L Stainless Steel Swipe/scroll horizontally to view full table
304/304L Stainless Steel
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.125"
C C C C C C
NPS
.25"
C C C C
NPS
.375"
C C C C
NPS
.5"
C
NPS
.75"
C
NPS
1"
C
NPS
2"
C
NPS
2.5"
C
NPS
3"
C
NPS
3.5"
C C C C
NPS
4"
C
NPS
4.5"
C C C C C C
NPS
5"
C C C C C
NPS
6"
C C
NPS
7"
C C C C C C
NPS
8"
C C C
NPS
9"
C C C C C C
NPS
10"
C C C C C C
NPS
11"
C C C C C C
NPS
12"
C C C C C C
NPS
14"
C C C C C C
NPS
16"
C C C C C C
NPS
18"
C C C C C C
NPS
20"
C C C C C C
NPS
22"
C C C C C C
NPS
24"
C C C C C C
NPS
26"
C C C C C C
NPS
28"
C C C C C C
NPS
30"
C C C C C C
NPS
32"
C C C C C C
NPS
34"
C C C C C C
NPS
36"
C C C C C C
NPS
42"
C C C C C C
NPS
48"
C C C C C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
316/316L Stainless Steel Swipe/scroll horizontally to view full table
316/316L Stainless Steel
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.125"
C C C C C C
NPS
.25"
C C C C
NPS
.375"
C C C C
NPS
.5"
C C C
NPS
.75"
C
NPS
1"
C C
NPS
2"
C C
NPS
2.5"
C C
NPS
3"
C C
NPS
3.5"
C C C C
NPS
4"
C C
NPS
4.5"
C C C C C C
NPS
5"
C C C C C
NPS
6"
C C C C
NPS
7"
C C C C C C
NPS
8"
C C C C C
NPS
9"
C C C C C C
NPS
10"
C C C C C C
NPS
11"
C C C C C C
NPS
12"
C C C C C C
NPS
14"
C C C C C C
NPS
16"
C C C C C C
NPS
18"
C C C C C C
NPS
20"
C C C C C C
NPS
22"
C C C C C C
NPS
24"
C C C C C C
NPS
26"
C C C C C C
NPS
28"
C C C C C C
NPS
30"
C C C C C C
NPS
32"
C C C C C C
NPS
34"
C C C C C C
NPS
36"
C C C C C C
NPS
42"
C C C C C C
NPS
48"
C C C C C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
321/321H Stainless Steel Swipe/scroll horizontally to view full table
321/321H Stainless Steel
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.25"
C C
NPS
.375"
C C
NPS
.5"
C C C C C
NPS
.75"
C C C C C
NPS
1"
C C C C C
NPS
1.25"
C C C C
NPS
1.5"
C C C C C
NPS
2"
C C C C C
NPS
2.5"
C C C C C
NPS
3"
C C C C C
NPS
3.5"
C C
NPS
4"
C C C C C
NPS
5"
C C
NPS
6"
C C C C
NPS
8"
C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
347/347H Stainless Steel Swipe/scroll horizontally to view full table
347/347H Stainless Steel
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.25"
C C
NPS
.375"
C C
NPS
.5"
C C C C C
NPS
.75"
C C C C C
NPS
1"
C C C C C
NPS
1.25"
C C C C
NPS
1.5"
C C C C C
NPS
2"
C C C C C
NPS
2.5"
C C C C C
NPS
3"
C C C C C
NPS
3.5"
C C
NPS
4"
C C C C C
NPS
5"
C C
NPS
6"
C C C C
NPS
8"
C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
Duplex 2205 Swipe/scroll horizontally to view full table
Duplex 2205
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.25"
C C
NPS
.375"
C C
NPS
.5"
C C C C C
NPS
.75"
C C C C C
NPS
1"
C C C C C
NPS
1.25"
C C C C
NPS
1.5"
C C C C C
NPS
2"
C C C C C
NPS
2.5"
C C C C C
NPS
3"
C C C C C
NPS
3.5"
C C
NPS
4"
C C C C C
NPS
5"
C C
NPS
6"
C C C C
NPS
8"
C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
310/310H/310S Swipe/scroll horizontally to view full table
310/310H/310S
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
NPS
.25"
C C
NPS
.375"
C C
NPS
.5"
C C C C C
NPS
.75"
C C C C C
NPS
1"
C C C C C
NPS
1.25"
C C C C
NPS
1.5"
C C C C C
NPS
2"
C C C C C
NPS
2.5"
C C C C C
NPS
3"
C C C C C
NPS
3.5"
C C
NPS
4"
C C C C C
NPS
5"
C C
NPS
6"
C C C C
NPS
8"
C C
Sch
10
Sch
40
Sch
80
Sch
120
Sch
160
Sch
320
Processing
Bar & Structural Cutting
More Info
Production Cutting
More Info
Tubular Polishing
More Info
Specifications

Lengths: 17′ – 24′ Random Lengths

ASTM A312
Value-Added Services
  • Let Penn Stainless cut your next seamless pipe requirement to your exact dimensions.
  • All Schedules stocked including Sch 5 thru DXH.
  • Yes, even 24” DXH seamless pipe can be supplied with short lead times.
  • Take advantage of our Domestic and International seamless stainless pipe mills to supply non standard wall thicknesses, lengths or chemistry.
  • Special Testing is available upon request.
Beveling

Beveling Stainless Steel tubes contain one end angled,  so that it mates with a complementary tube end. Tubes can be beveled for certain applications in order to make welding of stainless steel tubes easier, which saves weld prep time and money compared to hand cutting.

Heat Treating & Annealing

Penn Stainless Products can heat treat some 400 series stainless steel seamless tube. Heat treating realizes stress as a result of hardening, depending upon the chemistry of the metal being treated. Heat treating is also used for tempering, quenching, normalizing, and solution annealing.

Honing & Turning

During the honing/turning process, an abrasive rotating tool removes metal from the interior surface of a cylinder, pipe, or tube. The main purpose of honing is to finish the surface to a particular diameter and/or desired cylindrical geometric design. Honing is typically a secondary machining operation that completes a produce/part,  relieves stress created during production, or corrects features of the finished product. A typical production cycle is to drill, ream, heat treat, then hone.

Polishing

Positive Material Identification (PMI)

In some cases, it may be necessary to complete additional positive material identification testing. Penn Stainless Products can complete this testing in house or we can work with an independent laboratory to complete the testing. Please contact us for specific requirements.

UT Testing

Ultrasonic Testing (UT) utilizes sound energy at high frequencies, in order to provide examinations and measurements of the stainless steel product. This aids in flaw detection/evaluation, dimensional measurements, etc.

Tolerances

Stainless Steel Seamless Pipe Tolerances:

NPS DesignatorPermissible Variations in Outside Diameter
Over In.Under In.
1/8 to 1-1/2, incl1/64 (0.015)1/32 (0.031)
Over 1-1/2 to 4, incl1/32 (0.031)1/32 (0.031)
Over 4 to 8, incl1/16 (0.062)1/32 (0.031)
Over 8 to 18, incl3/23 (0.093)1/32 (0.031)

Nominal Wall Thickness:

  • Nominal Wall Tolerance Plus 12.5%, Minus 12.5%
  • These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe
  • (ANSI B 36.10 – 1979)
NPS DesignatorOutside Diameter in.Schedule 10S in.Schedule 40S in.Schedule 80S in.Schedule 160 in.Schedule XX in.
1/40.540.0650.0880.119
3/80.6750.0650.0910.126
1/20.840.0830.1090.1470.1880.294
3/41.050.0830.1130.1540.2180.308
11.3150.1090.1330.1790.250.358
1 1/41.660.1090.140.1910.250.382
1 1/21.90.1090.1450.20.2810.4
22.3750.1090.1540.2180.3430.436
2 1/22.8750.120.2030.2760.3750.552
33.50.120.2160.30.4380.6
3 1/240.120.2260.3180.636
44.50.120.2370.3370.5340.674
55.5630.1340.2580.3750.6250.75
66.6250.1340.280.4320.7190.864
88.6250.1480.3220.50.9060.875
1010.750.1650.3650.51.125
1212.750.180.3750.51.312
14140.1880.3750.51.406
16160.1880.3750.51.594

Minimum Wall Thickness on Inspection for Nominal (average) Pipe Wall Thickness:

  • The following equation, upon which this table is based, may be applied to calculate minimum wall thicknesses from nominal wall thickness:
    • tn * 0.875 = tm
      Where:
      tn = nominal wall thickness, in. [mm], and
      tm= minimum wall thicknesses, in. [mm]
    • The wall thickness is inch-pound units is rounded to three decimal places in accordance with the rounding method of Practice E29. The wall thickness in SI units is rounded to one decimal place in accordance with the rounding method of Practice E29.
  • This table is a master table covering wall thicknesses available in the purchase of different classifications of pipe, but it is not meant to imply that all the walls listed herein are necessarily obtainable for the applicable product specification.
Nominal ThicknessMinimum Thickness on InspectionNominal ThicknessMinimum Thickness on InspectionNominal Thickness
in.mminmminmminmminmm
0.0681.70.061.50.2947.50.2576.50.7519
0.0682.20.07720.37.60.2626.70.81220.6
0.0912.30.0820.3077.80.2696.80.84321.4
0.0952.40.0832.10.3087.80.276.90.85421.7
0.1132.90.0992.50.3127.90.2736.90.87522.2
0.11930.1042.60.3188.10.2787.10.90623
0.1253.20.1092.80.3228.20.2827.20.93723.8
0.1263.20.112.80.338.40.2897.30.96824.6
0.1333.40.1162.90.3378.60.2957.5125.4
0.143.60.1223.10.3438.70.37.61.03126.2
0.1453.70.1273.20.3448.70.3017.61.06227
0.1473.70.1293.30.3589.10.31381.08327.8
0.1543.90.1353.40.3659.30.3198.11.12528.6
0.15640.1363.50.3759.50.3288.31.15629.4
0.1794.50.15740.3829.70.3348.51.21830.9
0.18743.70.1644.20.410.20.358.91.2531.8
0.1884.80.1644.20.40610.30.35591.28132.5
0.1914.90.1674.20.43210.40.3789.61.31233.3
0.25.10.1754.40.43611.10.3829.71.34334.1
0.2035.20.1784.50.43711.10.3829.71.37534.9
0.2165.50.1894.80.43811.10.3839.71.40635.7
0.2185.50.1914.90.512.70.43811.11.43636.5
0.2195.60.1924.90.53113.50.46511.81.536.1
0.2265.70.19650.552140.48312.31.53138.9
0.23760.2075.20.56214.30.49212.51.56239.7
0.256.40.2195.60.59315.10.51913.21.59340.5
0.2586.60.2265.70.615.20.52513.31.7544.5
0.27670.2426.10.62515.90.54713.91.78145.2
0.27770.2426.10.65616.60.57314.61.81246
0.2797.10.2446.20.67417.10.59151.96850
0.287.10.2456.20.68717.40.60115.32.06252.4
0.2817.10.2466.20.71918.30.629162.34359.5