Types of Steel Tubes

Types of Steel Tubes

Steel Tube Standards Type Application
ASTM A199 Seamless cold drawn heat exchanger and condenser tubes For Heat Exchangers
ASTM A161 Seamless low-carbon and C-Mo steel tubes
ASTM A179 Seamless cold drawn low-carbon steel tubes.
ASTM A192 Seamless carbon steel boiler tubes For High-pressure Service – Boiler
ASTM A210 Seamless medium carbon steel boiler and superheater tubes
ASTM A209 Seamless C-Mo alloy steel boiler and superheater tubes
ASTM A213 Seamless ferritic and austenitic alloy-steel boiler and heat-exchanger tubes.
ASTM A335 Seamless ferritic alloy-steel tube
ASTM A556 Seamless cold drawn carbon steel heater tubes
ASTM A519 Seamless carbon and alloy steel mechanical tubing For Standard Use
ASTM A334 Seamless and welded carbon and alloy-steel tubes For Low Temperature Pressure Services
ASTM A795 Black and zinc-coated welded and seamless steel tube Suitable for Welding or Threading
ASTM A53 Black and zinc-coated welded and seamless steel tube
ASTM A822 Seamless cold drawn carbon steel tubing for hydraulic system service. For Pressure Hydraulic and Pneumatic Lines – HPL

Different Types of Steel Tubing As Per DIN, UNI, BS, NFA,ČSN, STN and PN-H Standard

Standard Dimensional Standard Application
API API 5L – Line Pipe
API API 5CT – casing and tubing
ASME ASME B16.9 elbows for low temperature
ASME ANSI B36.10 For Low Temperature Services
ASME SA53 Suitable for Welding/Threading
ASME SA334 For Low Temperature Services
BS 1965-1 elbows for elevated temperature
BS 1387 Suitable for Welding/Threading
BS 3059-1 For High-pressure Service
BS 3600 For Low Temperature Services
BS 3059-2 For High-pressure Service
BS 3602-1 For High-pressure Service
BS 3606 For Heat Exchangers
BS 3604-1 For High-pressure Service
BS 6323-3 For Machine Parts and General Use
BS 7416 For HPL
BS 6323-4 For Standard Use
ČSN 42 5710 Suitable for Welding/Threading
ČSN 13 2385 Butt Welding Reducers
ČSN 42 5711 Suitable for Welding/Threading
ČSN 42 5716 for structural purposes
ČSN 13 2200 Butt Welding Reducers
ČSN 42 5715 For Room Temperature Services
ČSN 42 6710 For Heat Exchangers
ČSN 42 6712 Ready to Use – HP
ČSN 42 6711 Ready to Use – HP
DIN 2391 Ready to Use – HP
DIN 2440 Suitable for Welding/Threading
DIN 2391-1 For HPL
DIN 2441 Suitable for Welding/Threading
DIN 2445-2 For HPL
DIN 2442 Suitable for Welding/Threading
DIN 2448 from fine grain steel
DIN 2605-1 Elbows for Water and Gas Pipe Line
DIN 2460 Suitable for Welding/Threading
DIN 2605-1, 2 elbows for elevated temperature
DIN 28180 For Heat Exchangers
DIN 2616-2 Butt Welding Reducers
EN 10216-1 For Room Temperature Services
EN 10210-2 for structural purposes
EN 10216-3 from fine grain steel
EN 10216-2 For High-pressure Service
EN 10216-4 For Low Temperature Services
EN 10253-1 Butt Welding Reducers
EN 10224 Suitable for Welding/Threading
EN 10253-2 Elbows for Room Temperature
EN 10294-1 For Machine Parts and General Use
EN 10255 Suitable for Welding/Threading
EN 10297-1 For Machine Parts and General Use
EN 10305-4 For HPL galvanized
EN 10305-1 Ready to Use – HP
EN ISO ISO 3183 – Line Pipe
GOST 12132 For Standard Use
GOST 8732 for structural purposes
GOST 1060 For Heat Exchangers
GOST 3262 Suitable for Welding/Threading
GOST 8734 For Standard Use
GOST TU 14-3-460 For High-pressure Service
GOST 9567 For Standard Use
JIS G3454 For Room Temperature Services
JIS G3445 For Standard Use
JIS G3455 For Room Temperature Services
JIS G3458 For High-pressure Service
JIS G3456 For High-pressure Service
JIS G3461 For High-pressure Service
JIS JOHS-102 For Pressure HPL
JIS G3462 For High-pressure Service
NF A 49-115 Suitable for Welding/Threading
NF A 49-210 For Room Temperature Services
NF A 49-186 Elbows for Room Temperature
NF A 49-112 For Room Temperature Services
NF A 49-211 For High-pressure Service
NF A 49-215 For Heat Exchangers
NF A 49-213 For High-pressure Service
NF A 49-281 Elbows for Room Temperature
NF A 49-311 For Machine Parts and General Use
NF A 49-310 For Standard Use
NF A 49-312 For Standard Use
NF A 49-501 for structural purposes
NF A 49-330 For HPL
PN ŽP ŽP 42 5760 Elbows for Water and Gas Pipe Line
PN – H 74220 Suitable for Welding/Threading
PN – H 74219 For Machine Parts and General Use
PN – H 74245 For HPL
PN – H 74240 For Standard Use
PN – H 74252 For High-pressure Service
STN 42 5710 Suitable for Welding/Threading
STN 13 2385 Butt Welding Reducers
STN 42 5711 Suitable for Welding/Threading
STN 13 2200 Butt Welding Reducers
STN 42 5716 For Room Temperature Services
STN 42 5715 For Room Temperature Services
STN 42 6710 For Low Temperature Services
STN 42 6712 Ready to Use – HP
STN 42 6711 Ready to Use – HP
UNI 4991 For Low Temperature Services
UNI 6363 Suitable for Welding/Threading
UNI 7088 – Line Pipe
UNI 7287 – Line Pipe
UNI 7729 For Machine Parts and General Use
UNI 7945 For HPL
UNI 8863 Suitable for Welding/Threading
UNI ISO 1129 For Heat Exchangers
UNI ISO 4200 For Machine Parts and General Use

Table of contents

ASME Standard for Steel Tube Dimensions

Standard Dimensional Standard Type
ASME ASME B16.26 Cast Copper Alloy Fittings for Flared Copper Tubes
ASME STP-PT-066 Design Guidelines for Corrosion, Erosion and Steam Oxidation of Boiler Tubes in Pulverized Coal-Fired Boilers
ASME A112.4.1 Water Heater Relief Valve Drain Tubes
ASME B31.12 Hydrogen Piping and Pipelines
ASME B36.19 Welded and Seamless Wrought Stainless Steel Pipe
ASME B36.10 Welded and Seamless Wrought Steel Pipe
ASME B36.10M Welded and Seamless Wrought Steel Pipe
ASME B36.19M Stainless Steel Pipe
ASME ASME Sb241 Aluminium Tube
ASME ASME SB-338 Titanium Tube

Different Types of Steel Tubes

U Tubes

U Tubes

Heat Exchanger Tubes

Heat Exchange Tube

Mechanical Tubes

Mechanical Tubes

Capillary Tubes

Capillary Tubes

Fin Tube

Fin Tube

Coiled Tubing

Coiled Tubing

Hydraulic Tubing

Hydraulic Tubing

Oval Tubes

Oval Tubes

Seamless Tube

Seamless Tube

Welded Tube

Welded Tube

Condenser Tubes

Condenser Tubes

Boiler Tube

Boiler Tube

Superheater Tubes

Superheater Tubes

Square Tube

Square Tube

Electropolish Tube

Electropolish Tube

Instrumentation Tube

Instrumentation Tube

Bright Annealed Tube

Annealed Tube

Cold Redrawn Reboiler Tubes

Reboiler Tubes

Sanitary Tubing

Sanitary Tubing

Rectangular Tubing

Rectangular Tubing

Chemical Injection Lines

Chemical Injection

Muffle Tubes

Muffle Tubes

Umbilical Tubing

Umbilical Tubing

Dom Tube

Dom Tube

Industrial Steel Tubes in Cold Rolled, Pickled & Oiled, Hot Rolled Material
  • Cold Rolled
  • Pickled & Oiled
  • Hot Rolled
  • Seamless
  • Cold Finished
  • Surface Finish
  • Hot Finished
Types of Corrosion Resistant Tubing
Stainless Steel Nickel Alloys
Titanium Copper
Aluminum Galvanized Steel
Bronze Brass
Titanium –

High Corrosion Resistant Tubes

Werkstoff Number Short Name Brand Name
2.4068 LC-Ni 99 Nickel 201
2.4066 Ni 99,2 Nickel 200
2.4360 NiCu30Fe Monel 400
2.4600 NiMo29Cr Hastelloy B-3
2.4375 NiCu30Al MonelK 500
2.4602 NiCr21Mo14W Hastelloy C-22
2.4605 NiCr23Mo16Al Alloy 59
2.4610 NiMo16Cr16Ti Hastelloy C-4
2.4619 NiCr22Mo7Cu Hastelloy G-3
2.4617 NiMo28 Hastelloy B-2
2.4630 (2.4951) NiCr20Ti Nimonic 75
2.4632 (2.4969) NiCr20Co18Ti Nimonic 90
2.4631 (2.4952) NiCr20TiAl Nimonic 80A
2.4633 NiCr25FeAlY (Nicrofer6025 HT) Alloy 602 CA
2.4654 NiCr19Co14Mo4Ti Waspaloy
2.4634 NiCo20Cr15MoAlTi Nimonic 105
2.4658 NiCr7030 Cronix70
2.4663 NiCr23Co12Mo Inconel 617
2.466 NiCr20CuMo 20Cb3/Alloy 20
2.4665 NiCr19NbMo Hastelloy X
2.4669 NiCr15Fe7TiAl Inconel X-750
2.4668 NiCr19NbMo Inconel 718
2.4675 NiCr23Mo16Cu Hastelloy C-2000
2.4819 NiMo16Cr15W Hastelloy C-276
2.4816 NiCr15Fe Inconel 600
2.4851 NiCr23Fe Inconel 601
2.4858 NiCr21Mo Incoloy 825
2.4856 NiCr22Mo9Nb Inconel 625
2.4951 NiCr20Ti Nimonic 75
2.4969 NiCr20Co18Ti Nimonic 90
2.4952 NiCr20TiAl Nimonic 80A

Fine-Grained Steel Tubes

Grades
  • P460N
  • P355N
  • P460NH
  • P355NH
  • P355NL1
  • P275NL1
  • P275NL2
  • P460NL1
  • P460NL2
  • P355NL2
Quality as per DIN 17179
  • Basic (StE)
  • Low temperature (TStE)
  • High temperature (WStE)
Quality as per EN 10216 -3
  • Basic (P-N)
  • Low temperature (P-NL1)
  • High temperature (P-NH)

Heat treatment of steel tubes

ASTM A519 DIN 2391-2
CW-Cold drawn BK -Cold drawn / hard
A-Annealed BKW -Cold drawn / soft
N-Normalized BKS -Cold drawn and annealed
SR-Annealed to relieve stresses GBK -annealed (soft)
NT-Normalization and tempering NBK -Normalized
QT-Quenched and tempered

Steel Tube Gauge and Dimensions

Steel Tubes Dimensions

Gauge OD (in.) OD (mm) ID (in.) ID (mm) Wall (in.) Wall (mm)
33 0.010 0.254 0.006 0.152 0.002 0.051
34 0.009 0.229 0.005 0.127 0.002 0.051
31 0.011 0.279 0.004 0.102 0.004 0.089
29 0.013 0.330 0.007 0.178 0.003 0.076
36 0.008 0.203 0.004 0.101 0.002 0.051
30 0.012 0.305 0.006 0.152 0.003 0.077
27 0.016 0.406 0.008 0.203 0.004 0.102
25 0.020 0.51 0.010 0.254 0.005 0.128
26 0.018 0.457 0.010 0.254 0.004 0.102
24 0.022 0.56 0.012 0.305 0.005 0.128
22 0.028 0.71 0.016 0.406 0.006 0.152
23 0.025 0.64 0.013 0.330 0.006 0.153
21 0.032 0.81 0.020 0.510 0.006 0.150
19 0.043 1.10 0.027 0.685 0.008 0.208
20 0.035 0.89 0.023 0.584 0.006 0.153
18 0.049 1.24 0.033 0.85 0.008 0.195
16 0.065 1.65 0.047 1.20 0.009 0.225
17 0.058 1.47 0.043 1.10 0.008 0.185
15 0.072 1.82 0.053 1.35 0.010 0.235
13 0.092 2.34 0.070 1.77 0.011 0.285
14 0.081 2.05 0.061 1.55 0.010 0.250
12 0.104 2.65 0.079 2.00 0.013 0.325
10 0.129 3.30 0.098 2.50 0.016 0.400
11 0.116 2.95 0.091 2.30 0.013 0.325
9 0.145 3.69 0.113 2.87 0.016 0.410
7 0.175 4.45 0.145 3.69 0.015 0.380
8 0.159 4.04 0.129 3.28 0.015 0.380
6 0.196 4.98 0.160 4.07 0.018 0.455
4 0.236 6.00 0.200 5.08 0.018 0.460
5 0.215 5.46 0.179 4.55 0.018 0.455

Manufacturing Process of Steel Tubing

Manufacturing Process of Steel Tubing

Mechanical Properties of Stainless Steel Tube

Grade (Annealed) Yeild Strength Tensile Strength Elongation Hardness
SS 316TI 30 (205) 75 (515) 35 90 HRB max
SS 316H 30 (205) 75 (515)
SS 316L 25 (170) 70 (485)
SS 316 30 (205) 75 (515)
TP 304H 30 (205) 75 (515)
TP 304L 25 (170) 70 (485)
TP 304 30 (205) 75 (515)

Standard Steel Tube Shapes

  • Oval
  • Round
  • Rectangular
  • Square
  • Custom shapes
  • “D” shape

Tubular Steel Pressure Rating

O.D (in.) Wall Thickness (in.)
.188 0156 .134 .120 .109 .095 .083 .065 .049 .035 .028 .020 .016 .014 .012 .010
Pressure (psig)
2 3600 2900 2500 2200 2000
1-1/2 4900 4000 3400 3000 2700 2300
1-1/4 4900 4100 3600 3300 2800 2400
1 4700 4200 3600 3100 2400
7/8 4800 4200 3600 2800 2000
3/4 5800 4900 4200 3300 2400
5/8 6000 5200 4000 2900
1/2 6700 5100 3700 2600
3/8 6500 4800 3300
5/16 8000 5800 4000
1/4 10200 7500 5100 4000
3/16 10200 7000 5400
1/8 10900 8500
1/16 12100 9400 8100 6800 5600

Inspection Documents Required for Steel Tubes

  • EN 10204 or ISO 10474
  • Type 2.1 (Declaration of Conformity)
  • Type 2.2 (Test Report)
  • MTC 3.1 (Issued by manufacturer)
  • MTC 3.2

Sizes of Steel Tubing

DN (mm) 8 6 10 20 15 25 40 32 50 80 65
NPS (in.) 1/4 1/8 3/8 3/4 1/2 1 1 1/2 1 1/4 2 3 2 1/2

Steel Tube Industrial Applications

  • Oil and Gas pipelines
  • Construction
  • Medical devices
  • Automotive industry
  • Agricultural implements
  • Energy sector

Hydraulic Steel Tube Pressure Ratings

Rating Factor NA 0.83 0.89 0.89 1.0 0.90
° F 482 392 347 302 248 -40
° C 250 200 175 150 120 -40

5 Common Types of Round Steel Tubes

  • Cold Drawn Seamless (CDS)
  • Hot Finished
  • Electric Resistance Welding (ERW)
  • Hydraulic
  • Drawn-Over-Mandrel (DOM)

Russian standards of steel tubing

GOST 8731 Hot-rolled seamless steel tubes
GOST 24030 Corrosion resistant seamless tubing
GOST 9941 cold- and warm-deformed seamless tubes
GOST 10704-91 Electrically Welded Steel Line-End Tubes

Most Common Steel Tube grades for Heat Exchanger

DIN 1629 St 37.0
EN 10216-2 P235GH
DIN 17175 St35.8, 15Mo3
ASTM A179 SA 179
DIN 17173 TTSt35N
ASTM A161 Grade T-1/ Gr.C
ASME SA 213 T12, T11, T91

Coated Tubular Steel Types

  • Aluminized Steel Tubes
  • Galvanized Steel Tubes
  • Zinc-Nickel Steel Tubes

Steel tubes for low temperatures

EN 10216-4 P265NL and P215NL.
ASTM A/SA 333 Grade 1, 6, 3, 7 (A999)
ASTM A/SA 334 Gr 1, Gr 6 (A1016)
ASTM A/SA 524 Grade II (A530)

Hydraulic Tube Working Pressure

No. Dimension Burst Pressure Working Pressure IMPA CODE
10 10 mm OD x 1.2 mm WT x 6 m 845 339 710708
9 10 mm OD x 1 mm WT x 6 m 702 283 710707
8 8 mm OD x 2.5 mm WT x 6 m 2194 883 –
7 8 mm OD x 2 mm WT x 6 m 1755 707 710706
6 8 mm OD x 1.5 mm WT x 6 m 1316 530 710705
5 8 mm OD x 1 mm WT x 6 m 878 353 710704
4 6 mm OD x 1.5 mm WT x 6 m 1755 707 710703
3 6 mm OD x 1 mm WT x 6 m 1170 471 710702
2 5 mm OD x 1 mm WT x 6 m 1404 565 –
1 4 mm OD x 1 mm WT x 6 m 1755 707 710701

Types Of Seamless and Welded Steel Tubes

  • Seamless Steel Tubes
    • Cold drawn tube
    • Hot-rolled seamless tube
    • Cold spinning tube
    • Thermal expansion tube
    • Precision steel tube
    • Extrusion tube etc.
  • Welded Steel Tubes
    • Electric welding tube
    • Furnace welded tube
    • Longitudinal welded tube
    • Automatic arc welded tube
    • Special-shaped welded Tubes
    • Round welded tube
    • Two types of spiral welded tube

Stainless Steel Tube Types Dimensions

Precision Stainless Steel Tubes – OD > 3 to 40mm
– WT > 0.1 to 2.5 mm
– Tolerances > ±0.01 mm
Small Diameter Stainless Steel Tubes – OD > 0.2 to 6mm
– WT > 0.05 to 2.0 mm
– Tolerances > ±0.05 to 0.01 mm
Shaped Tubes – OD > 1.5 to 10 mm
– WT > 0.12 to 1.5 mm
– Tolerances > ±0.05 to

Construction Criteria for Steel Tubes

Property Welded Seamless Welded & Drawn
OD Tolerance 0 + +
Wall Tolerance + – +
Heavy Wall/OD 0 + +
Grain Structure 0 + +
Cost + – 0