China's most trusted manufacturers of Stainless Steel Pipes & Tubes.
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Stainless Steel Pipes

Hunan Great Steel Pipe Co,.Ltd offers all Stainless Steel Pipe, Stainless Steel Tubes,Stainless Steel Seamless Pipes for the Oil & Gas and Refinery Industry in the form of Stainless Steel Hexagonal Pipe, Stainless Steel Round Pipe, Stainless Steel Square Pipe, and Stainless Steel Hollow Pipe, Stainless Steel Pipe Suppliers. Stainless steel Pipe is stronger, low maintenance, higher corrosive resistant, attractive in appearance, and costlier than a standard grade of steel. Schedule 40 stainless steel pipe, ASME B36.10 SS Electropolish Pipe dimensions are obtainable in pipe sizes such as 1/2", 1/4", 1/8", 3/8", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 6" and 8". Stainless steel is a versatile material comprised of a steel alloy and a small percentage of chromium — the addition of chromium adds to the material’s corrosion resistance, a trait that earned stainless steel its name. Because stainless steel is also low-maintenance, oxidation resistant, and doesn’t affect other metals it comes in contact with, it is frequently used in a large array of applications, especially in piping and tubing manufacturing.

Material

Grade
Stainless Steel TP304, 304L, 304H, 316, 316L, 316H, 316Ti, 317, 317L, 310S, 310H, 347, 347H, 321, 321H, 904L, S31254(254SMO) (mat.1.4301,1.4307,1.4948,1.4401,1.4404,1.4571,1.4438,1.4438, 1.4833,1.4841,1.4845,1.4845,1.4450,1.4541,1.4878,1.4539, ,1.4547) etc.
 

The specific standards of each country are as follows:

No China,GB Japan American Korea EUR Indai Australia Tai Wan
Old New（07.10） JIS ASTM UNS KS BS EN IS IS CNS
Austenitic stainless steel
1 1Cr17Mn6Ni5N 12Cr17Mn6Ni5N SUS201 201 S20100 STS201 1.4372 10Cr17Mn6Ni4N20 201-2 201
2 1Cr18Mn8Ni5N 12Cr18Mn9Ni5N SUS202 202 S20200 STS202 1.4373 - 202
3 1Cr17Ni7 12Cr17Ni7 SUS301 301 S30100 STS301 1.4319 10Cr17Ni7 301 301
4 0Cr18Ni9 06Cr19Ni10 SUS304 304 S30400 STS304 1.4301 07Cr18Ni9 304 304
5 00Cr19Ni10 022Cr19Ni10 SUS304L 304L S30403 STS304L 1.4306 02Cr18Ni11 304L 304L
6 0Cr19Ni9N 06Cr19Ni10N SUS304N1 304N S30451 STS304N1 1.4315 - 304N1 304N1
7 0Cr19Ni10NbN 06Cr19Ni9NbN SUS304N2 XM21 S30452 STS304N2 - - 304N2 304N2
8 00Cr18Ni10N 022Cr19Ni10N SUS304LN 304LN S30453 STS304LN - - 304LN 304LN
9 1Cr18Ni12 10Cr18Ni12 SUS305 305 S30500 STS305 1.4303 - 305 305
10 0Cr23Ni13 06Cr23Ni13 SUS309S 309S S30908 STS309S 1.4833 - 309S 309S
11 0Cr25Ni20 06Cr25Ni20 SUS310S 310S S31008 STS310S 1.4845 - 310S 310S
12 0Cr17Ni12Mo2 06Cr17Ni12Mo2 SUS316 316 S31600 STS316 1.4401 04Cr17Ni12Mo2 316 316
13 0Cr18Ni12Mo3Ti 06Cr17Ni12Mo2Ti SUS316Ti 316Ti S31635 - 1.4571 04Cr17Ni12MoTi20 316Ti  316Ti
14 00Cr17Ni14Mo2 022Cr17Ni12Mo2 SUS316L 316L S31603 STS316L 1.4404 -02Cr17Ni12Mo2 316L 316L
15 0Cr17Ni12Mo2N 06Cr17Ni12Mo2N SUS316N 316N S31651 STS316N - - 316N 316N
16 00Cr17Ni13Mo2N 022Cr17Ni13Mo2N SUS316LN 316LN S31653 STS316LN 1.4429 - 316LN 316LN
17 0Cr18Ni12Mo2Cu2 06Cr18Ni12Mo2Cu2 SUS316J1 - - STS316J1 - - 316J1 316J1
18 00Cr18Ni14Mo2Cu2 022Cr18Ni14Mo2Cu2 SUS316J1L - - STS316J1L - - - 316J1L
19 0Cr19Ni13Mo3 06Cr19Ni13Mo3 SUS317 317 S31700 STS317 - - 317 317
20 00Cr19Ni13Mo3 022Cr19Ni13Mo3 SUS317L 317L S31703 STS317L 1.4438 - 317L 317L
21 0Cr18Ni10Ti 06Cr18Ni11Ti SUS321 321 S32100 STS321 1.4541 04Cr18Ni10Ti20 321 321
22 0Cr18Ni11Nb 06Cr18Ni11Nb SUS347 347 S34700 STS347 1.455 04Cr18Ni10Nb40 347 347
Austenitic ferritic stainless steel (duplex stainless steel)
23 0Cr26Ni5Mo2 - SUS329J1 329 S32900 STS329J1 1.4477 - 329J1 329J1
24 00Cr18Ni5Mo3Si2 022Cr19Ni5Mo3Si2N SUS329J3L - S31803 STS329J3L 1.4462 - 329J3L 329J3L
0Cr18Ni10Ti Iron type stainless steel
25 0Crl3Al 06Crl3Al SUS405 405 S40500 STS405 1.4002 04Cr13 405 405
26 - 022Cr11Ti SUH409 409 S40900 STS409 1.4512 - 409L 409L
27 00Cr12 022Cr12 SUS410L - - STS410L - - 410L 410L
28 1Cr17 10Cr17 SUS430 430 S43000 STS430 1.4016 05Cr17 430 430
29 1Cr17Mo 10Cr17Mo SUS434 434 S43400 STS434 1.4113 - 434 434
30 - 022Cr18NbTi - - S43940 - 1.4509 - 439 439
31 00Cr18Mo2 019Cr19Mo2NbTi SUS444 444 S44400 STS444 1.4521 - 444 444
Martensitic stainless steel
32 1Cr12 12Cr12 SUS403 403 S40300 STS403 - - 403 403
33 1Cr13 12Cr13 SUS410 410 S41000 STS410 1.4006 12Cr13 410 410
34 2Cr13 20Cr13 SUS420J1 420 S42000 STS420J1 1.4021 20Cr13 420 420J1
35 3Cr13 30Cr13 SUS420J2 - - STS420J2 1.4028 30 Cr13 420J2 420J2
36 7Cr17 68Cr17 SUS440A 440A S44002 STS440A - - 440A 440A
 

European Standard

European stainless steel tube & pipe standards specify 4 classes outer diameter and wall thickness in percentage or absolute value on the basis of nominal dimension. Generally, larger diameter or heavy wall thickness stainless steel pipe use percentage, small diameter or thin wall thickness stainless steel tube use absolute value.
Standard Manufacturing Process & Type Outer Diameter Tolerance Wall Thickness Tolerance Others
OD (Mm) Class
EN10216-5 Hot Finished Seamless Tube 219.1-610 D1 +22.5%T，-15%T T/D≤0.05
T1 T/D≤0.09
T2 T/D>0.09
30-219.1 D2 T1
T2
Cold Finished Seamless Tubes ≤219.1 D3 T3
D4 T4 Agreement
EN10297-2 Hot Finished Seamless Tube D1 T1
D2 T2 Agreement
Cold Finished Seamless Tubes D3 T3
D4 T4 Agreement
EN10217-7 Welded Tubes >168.3 D2 T3
≤168.3 D3 T3
D4 T3 Agreement
EN10296-2 Welded Tubes >168.3 D2 T3
≤168.3 D3 T3
≤114.3 D4 T3 Agreement
EN10312 Welded Tubes Series 1 D4 T3 T=0.6-2 Mm
Series 2 D3 – D4 T3 – T4 T=1-3 Mm
 

America Standard

ASTM A999 ASTM A1016
ASTM A312 / A12M A213 / A213M
A358 / A358M A249 / A249M
A376 / A376M A268 / A268M
A409 / A409M A269
A778 A270
A790 / A790M A688 / A688M
A813 / A813M A789 / A789M
A814 / A814M A803 / A803M
A928 / A928M
Standard Manufacturing & delivery condition Outside Diameter OD tolerance mm Thickness T tolerance mm
OD / mm T / mm Minimum Average
ASTM A1016 Hot drawn seamless tubes <=100 +0.4, -0.8 <=2.4 +0.4t, 0
A1016M 100 – 200 +0.4, -1.2 2.4 – 3.8 +0.35t, 0
200 – 225 +0.4, -1.6 3.8 – 4.6 +0.33t, 0
>=4.6 +0.28t, 0
Cold drawn seamless tubes <25 +0.1, -0.11 +0.20t, 0 +/-0.10t
25 – 40
40 – 50 +/-0.2 +0.22t, 0 +/-0.10t
50 – 65 +/-0.25
65 – 75 +/-0.3
75 – 100 +/-0.38
100 – 200 +/-0.38, -0.04
200 – 250 +/-0.38, -1.14
Welded tubes 40 – 50 +/-0.2 +0.18t, 0 +/-0.10t
50 – 65 +/-0.25
65 – 75 +/-0.3
75 – 100 +/-0.38
100 – 200 +/-0.38, -0.04
200 – 250 +/-0.38, -1.14
ASTM A999 / M Seamless tubes and welded tubes <48.3 +0.4, -0.8 -0.125t
ASTM A312 / M Seamless tubes and welded tubes 48.3-114.3 +/-0.8 OD=10.3-73 +0.20 t, -125t
168.3-219.1 +1.6, -0.8 t/OD<=5% OD=88.9-457.2 +0.225 t, -125t
219.1-457.2 +2.4, -0.8 t/OD>5% OD=88.9-457.2 +0.15 t, -125t
Welded tubes 508-660 +3.2, -0.8 OD>=508 +0.175 t，-0.125 t
711-864 +4.0, -0.8 t/OD<=5%, OD>=508 +0.225 t，-0.125 t
Seamless tubes 914-1209 +4.8, -0.8 t/OD>5%, OD>=508 +0.15 t, -125t
ASTM A409 / M Welded tubes +/-0.2% T<4.8
+/-0.4% t>=4.8
ASTM A358 / M Welded tubes +/-0.50%
ASTM A511 Seamless tubing <=12.7 +/-0.1 +/-0.15t
12.7-38.1 +/-0.2 +/-0.10t
38.1-88.9 +/-0.3
88.9-139.7 +/-0.4
139.7-203.1 +/-0.8
203.1-220 +/-1.1
220-325 +/-1.6

China Standards

China has more quantity standards compared to European standards, but less than american standards, SS tube and pipe standards are similar with EU standards in system, and absorb favorable experience in USA specifications.  
Specification Manufacturing O.D(Mm) O.D Tolerance W.T(Mm) W.T Tolerance
GB13296 Cold Rolled Seamless Pipe 6-30 ±0.15/-0.2 1-3 +20% -0%
＞30-50 ±0.3 ＞3 +22% -0%
＞50 ±0.75% Also Average Wall
GB/T14976 Cold Rolled Seamless Tube 6-10 ±0.15 1-3 +12.5% -12.5%
10-30 ±0.2 ＞3 +12.5% -10%
30-50 ±0.3 Average Wall, +22%
＞50 ±0.8%

Standard Comparison

Stainless steel tube & pipe wall thickness tolerance are the same as the general accuracy of American ASTM / ASME and EU standards, but slightly lower than the high requirements of the EU standards. Stainless steel tube & pipe outer diameter tolerances are mostly lower than American standards, and approaching the EU standards. it is more reasonable that the American standard specify the OD tolerance is tight, compared to thickness tolerance. China GB standards and EU standard have no weight tolerance specified, seamless tube & pipe in GB standard delivery goods as actual weight or theoretical weight, welded tube & pipe as theoretical weight or actual weight.

Applications

A.I.S.I. U.N.S. Characteristics End-Use
301 S30100 Able to attain tempers from 1⁄4 through fullhard, extra full hard by cold rolling.Withstands severe forming in annealedcondition. Kitchen sinks, Automotive wheelcovers. Toaster springs, Seat beltbuckles
303 S30300 Highest machinability rating among the300 series. Forming and welding are notrecommended. Nuts and bolts, threaded rods,Fittings.
304 S30400 Excellent corrosion resistance and suitablefor deep drawing applications when Nickelcontent is increased. Carbon content.08% max. Food Industry, Chemical Industry,Deep drawing applications, Aestheticapplication.
304L S30403 Same characteristics as 304 with a lowercarbon content .03% max. Used whenpost weld annealing is impossible. Thelower carbon content reduces carbide precipitation in the welded zone. Large fabricated equipment.
316 S31600 Molybdenum bearing alloy with betteroverall corrosion resistance than 304 and higher creep strength at elevated temperatures. Marine coastal environments, Pulpand paper industry, Chemical andpetrochemical Industry
316L S31603 Same characteristics as 316 with a lower Carbon content .03 max. Good corrosion resistance in high temperature intermittentservice. Used when post weld annealing is impossible. The lower carbon contentreduces Carbide precipitation in the welded zone. Large fabricated equipment.
317L S31703 Higher Molybdenum content than 316 forbetter corrosion resistance. Carbon content .03% max. Corrosive environments. Chemicaland petrochemical industries.
309 S30900 309S S30908 Heat resisting alloy with good corrosionresistance. High tensile and creepstrengths as well as at elevated temperatures. 309S has a lower Carbon content.03 max. Furnace parts, Baffles, Cement kilnchains. Exhaust manifold butterflyvalves.
310 S31000 310S S31008 Improved characteristics over 309 andbetter scaling resistance in intermittentelevated temperatures. Grade 310 has alow co-efficient of expansion. Furnace parts, Carburizing boxes,Heat exchangers, Oil burner parts.
Oil and Gas& Nuclear Power& LNG (liquefied natural gas)& Desalination& Mining and Minerals.