ASTM A53 PIPES


In this article, we illustrate the ASTM A53 specification for seamless and welded pipes for high-temperature service.


APPLICATION OF ASTM A53 PIPES

Pipes ASTM A53 black steel

ASTM A53/ASME SA 53 carbon steel pipes are available in the size range 1/4 to 30 inches and schedules 10 to 160, both in seamless and welded execution, black and hot dip galvanized (HDG). The dimensions of ASTM A53 pipes follow the standardization of the ASME B36.10 specification.

These pipes are largely used to convey fluids at low/medium pressures such as oil, gas, steam, water, air and also for mechanical applications (even if ASTM A500 pipes are preferred in this case). A53 pipes can be welded, flanged and shaped as necessary (coiling, bending). There are three types of ASTM A53 pipes:

  • type F: continuous welding / longitudinal furnace butt welded (this type is not suited for flanging)
  • type S: seamless pipe (hot rolled and cold finished)
  • type E: erw pipe

In terms of materials, the standard foresees two grades: ASTM A53 grade A and grade B. A53 grade B pipes are more common.

 

THE ASTM A53 SPECIFICATION

This specification covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1/8 to NPS 26. The steel categorized in this standard must be open-hearth, basic-oxygen or electric-furnace processed and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum, and vanadium. The tubing shall undergo a seamless or welding process. Tension, bend, and flattening tests shall be performed to make sure that it must adhere to the mechanical properties of the standard. The hydrostatic test shall be applied, without leakage through the weld seam or the pipe body. Nondestructive electric test shall be made to make sure that the full volume of the pipe must be in accordance with the standard. The purchaser shall have the right to perform any of the inspections and tests set forth in this specification where deemed necessary to ensure that the pipe conforms to the specified requirements. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

(Source: ASTM)

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ASTM A53 pipe specification.pdf


 

CHEMICAL COMPOSITION ASTM A53 GRADE A/B PIPES

Element Grade A  Grade B 
Carbon % 0.25 max 0.30 max
Manganese %  0.95 max 1.20 max
Phosphorous % 0.05 max 0.05 max
Sulphur % 0.045 max 0.045 max
Copper % 0.50 max 0.50 max
Nickel %  0.40 max 0.40 max
Chromium %  0.40 max 0.40 max
Molybdenum %  0.15 max 0.15 max
Vanadium %  0.08 max 0.08 max

 


 

MECHANICAL PROPERTIES ASTM A53 PIPES

YIELD, TENSILE STRENGTH AND, ELONGATION ASTM A53

Name Product thickness
mm
Yield/ proof strength
ReH N/mm² min.
Tensile strength Rm
N/mm²
Elongation min. Minimum average impact energy KV J
At a temperature in °C of
longitudinal transverse longitudinal

trans- verse

0

0 -10
Grade A* 205 min. 330

 

P235TR1*
P235TR2*

T ≤ 16 235

 

 

360 – 500

 

 

25

 

 

23

 

40b

 

28b

 

27b

16 < T ≤ 40 225
40 < T ≤ 60 215
Grade B* 240 min. 415

 

P265TR1*
P265TR2*

T ≤ 16 265

 

 

410 – 570

 

 

21

 

 

19

 

40b

 

28b

 

27b

16 < T ≤ 40 255
40 < T ≤ 60 245

 * Delivery condition N=normalizing incl. normalizing forming

PHYSICAL PROPERTIES ASTM A53

Density at 20 °C

Kg/dm³

Modulus of elasticity kN/mm² at

Thermal conductivity at 20 °C

W/m K

spec. thermal capacity at 20 °C

J/kg K

spec. electrical resistivity at 20 °C

Ω mm²/m

20 °C 300 °C 400 °C 450 °C
7,85 210 192 184 179 51 461 0,20

HOT FORMING AND HEAT TREATMENT ASTM A53

Hot forming Heat treatment
Temperature °C Type of cooling Normalizing 1) Stress relieving anneal 2) Type of cooling
1100 – 950 Air 890 – 950 °C 600 – 650 °C Air

Notes: 

1)   Normalizing: Holding time 1 minute per mm plate thickness, minimum 30 minutes
2)   Stress relieving anneal: Holding time 1-2 minutes per mm plate thickness, minimum 30 minutes

TOLERANCES ASTM A53

The tolerances for A53 pipes are set in the table below:

  • wall thickness: the wt of the pipe shall be, at any point, not less than the nominal pipe size minus 12.5% (a wt of NPS -13% would not be, for instance, acceptable)
  • weight per foot: + / – 10%

TESTING ASTM A53 PIPES

Below are the required physical strength requirements under ASTM A53 Type E for grades A and B.

Test Grade A Grade B 
Yield  30,000 psi 35,000 psi
Tensile 48,000 psi 60,000 psi
Elongation Determined by formula Determined by formula

In addition to the chemical and physical analysis, the following tests are required under ASTM A53:

Test Test 
Flattening   Bend Test (Less than or equal to 2.375″ OD) *
Hydrostatic Transverse Weld Tension (Equal to or greater than 8.625″ OD)


PIPE ENDS ASTM A53

  • Pipe schedule below 0.500 inches and schedule STD / XS pipes: plain or beveled ends
  • Pipe schedule above 0.500 inches and schedule XXS: Squared cut plain ends

If pipes are supplied with threaded ends, protection for threads is mandatory for pipes above 4 inches.

 


ASTM A53 PIPES MARKING REQUIREMENTS

Each length of pipe (or bundle for smaller diameters) shall have the following markings applied:

  • Manufacturer name
  • A53 type (S, E, F)
  • Diameter and schedule (from 10 to 160 and XXS)
  • Designation “ASTM A53”
  • Pipe length
  • Heat number

It is frequent to find pipes compliant to multiple standards at the same time: A53/A106/API 5L Gr. B (in this case the marks reports any covered standards).

 


HOT-DIP GALVANIZED A53 PIPES

Hot-dip galvanized ASTM A53 steel pipes are made out of wrought steel and have an external and internal coating of zinc. Galvanized steel pipes are widely used in water and sewerage applications, firefighting and plumbing systems. This type of pipes has long lasting durability, improved resistance to corrosion vs black steel, relatively cheap price and good toughness. On the other side, galvanized pipes are heavy, difficult to repair and tend to develop blockages over the course of time. The zinc coating should be between 1.6 and 1.8 oz per square foot.

 


ASTM A53 PIPES MANUFACTURERS

ERW PIPES (1/8-72″)

ERW Pipe Mill Country
American Steel Pipe USA
Atlas Tube USA
Boomerang USA
Independence Tube USA
Northwest Pipe USA
Paragon USA
Southland Tube USA
Stupp Corporation USA
Tenaris Italy
TexTube USA
TMK Ipsco USA
US Steel USA
Welspun USA
Wheatland USA
Evraz Canada
Husteel South Korea
Hyundai South Korea
JFE Japan
JV Nippon Sumitomo Japan
Pytco Mexico
Salzgitter Mannesmann Germany
Seah Steel South Korea
Tata India / UK

 

DSAW PIPES (24-72″)

DSAW Pipe Mill Country
Berg Steel USA
Confab Brazil
Durabond USA
Evraz Canada
Husteel South Korea
Hyundai South Korea
JFE Japan
JSW USA
ILVA Italy
JV Nippon Sumitomo Japan
Seah Steel South Korea
Sumitomo Corp. Japan
Tata Steel (ex-Corus) India / UK