astm a213 - sa213 tube {Astm a213/asme sa213 standard specification} india

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Standard Specification for A 213/ SA 213

SA-213-T22

Seamless ferritic and austenitic alloy steel boiler, superheater, and heat exchanger tubes. ASTM A 213 (ASME SA -213 is identical). This specification covers minimum wall thickness seamless austenitic stainless steel tubing intended for high.

A213 / SA 213

Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes

Overview 

1.1 This specification covers minimum-wall-thickness, seamless ferritic and austenitic steel, boiler and superheater tubes and austenitic steel heat-exchanger tubes, designated Grades T5, TP304, etc. These steels are listed in the specification (Tables 1-3).

1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP310HCbN, TP316H, TP321H, TP347H, TP347HFG (fine grained) and TP348H are modifications of Grades TP304, TP309S, TP309Cb, TP310S, TP310Cb, TP316, TP321, TP347, and TP348, and are intended for high-temperature service, such as for superheaters and reheaters.

1.3 The tubing sizes and thicknesses usually furnished to this specification are 1/8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

1.4 Mechanical property requirements do not apply to tubing smaller than 1/8 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness.

1.5 Optional supplementary requirements are provided and, when desired, shall be so stated in the order.

1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. (A combination of values from the two systems may result in nonconformance with the specification.) The inch-pound units shall apply unless the "M" designation of this specification is specified in the order.

Types of Asme sa213 tube

Asme sa213 t5 tube Asme sa213 t5 Super heater, Heat-Exchanger Tubes
Asme sa213 t9 tube Asme sa213 t9 Super heater, Heat-Exchanger Tubes
Asme sa213 t11 tube Asme sa213 t11 Super heater, Heat-Exchanger Tubes
Asme sa213 t22 tube Asme sa213 t22 Super heater, Heat-Exchanger Tubes
Asme sa213 t91 tube Asme sa213 t91 Super heater, Heat-Exchanger Tubes
Asme sa213 t92 tube Asme sa213 t92 Super heater, Heat-Exchanger Tubes
Asme sa213 t5 boiler tube Asme sa213 t5 Alloy Steel Seamless tube
Asme sa213 t9 boiler tube Asme sa213 t9 Alloy Steel Seamless tube
Asme sa213 t11 boiler tube Asme sa213 t11 Alloy Steel Seamless tube
Asme sa213 t22 boiler tube Asme sa213 t22 Alloy Steel Seamless tube
Asme sa213 t91 boiler tube Asme sa213 t91 Alloy Steel Seamless tube
Asme sa213 t92 boiler tube Asme sa213 t92 Alloy Steel Seamless tube

Types of Astm A213 tube

Astm A213 t5 tube Astm A213 t5 Super heater, Heat-Exchanger Tubes
Astm A213 t9 tube Astm A213 t9 Super heater, Heat-Exchanger Tubes
Astm A213 t11 tube Astm A213 t11 Super heater, Heat-Exchanger Tubes
Astm A213 t22 tube Astm A213 t22 Super heater, Heat-Exchanger Tubes
Astm A213 t91 tube Astm A213 t91 Super heater, Heat-Exchanger Tubes
Astm A213 t92 tube Astm A213 t92 Super heater, Heat-Exchanger Tubes
Astm A213 t5 boiler tube Astm A213 t5 Alloy Steel Seamless tube
Astm A213 t9 boiler tube Astm A213 t9 Alloy Steel Seamless tube
Astm A213 t11 boiler tube Astm A213 t11 Alloy Steel Seamless tube
Astm A213 t22 boiler tube Astm A213 t22 Alloy Steel Seamless tube
Astm A213 t91 boiler tube Astm A213 t91 Alloy Steel Seamless tube
Astm A213 t92 boiler tube Astm A213 t92 Alloy Steel Seamless tube

BOILER TUBE GRADES

CARBON STEEL

SA178 

Carbon steels show mild corrosion resistance and fair strength up to 1000F. However, their usage above 800F must take into account the susceptibility to graphitization. Graphitization has not been a significant problem in thicknesses encountered in boiler tubing. Use of heavy section pipe above 800F, however, is not recommended. The application of seamless and welded carbon steel tubing in boilers is restricted to a maximum temperature of 800F for rimmed and 1000F for killed steel by the ASME Boiler and Pressure Vessel Code, “Section I, Power Boilers.” The Code does not list maximum allowable stresses beyond 1000F for carbon steels.Carbon-molybdenum steels

CARBON-MOLYBDENUM STEELS

SA209 

Carbon-moly steels exhibit higher creep strengths than plain carbon steels, and are widely used in high-temperature boiler service. These steels nominally contain 0.5% molybdenum. When exposed to temperatures above 850-900F for long periods of time, the carbon-moly steels are also prone to graphitization. Again, the phenomenon is section-size dependent, and using pipe of this grade above 850F is not recommended. The carbide phase is not stable, and will revert to graphite. The ASME Boiler and Pressure Vessel Code, “Section I,” lists allowable stresses for carbon-moly steels up to 1000F.

INTERMEDIATE CHROME ALLOYS

SA213-T2

This low alloy steel exhibits graphitization resistance and greater creep strength than the carbon-moly steels. Corrosion resistance is comparable to carbon-moly. T2 has allowable stresses listed up to 1000F in the ASME Boiler Code.

  The chromium in all of the Croloys stabilizes the carbon as chromium carbides, thus making them immune to graphitization.

SA213-T12

This is a 1-chromium, 1/2-molybdenum alloy which is limited to a maximum temperature of 1200F by the ASME Boiler and Pressure Vessel Code, “Section I, Allowable Stresses.” T12 is sometimes used in place of T2 tubing because of its greater strength.
SA213-T11
This grade has the same creep strength properties as T12. It is more corrosion resistant than the chromium-free steels, and is fairly resistant to high-temperature oxidation because of its higher silicon and chromium contents.
  Oxidation resistance is important because metals exposed to elevated temperatures for extended periods of time will accumulate a protective coating of scale. At some minimum temperature, the scale will become non-adherent, gradually flake, and cause solid particle erosion of turbines. However, exfoliation rarely causes failures before creep or high temperature yielding. 
Allowable stresses are listed by the ASME Boiler and Pressure Vessel Code to 1200F.

SA213-T22

This 2-1/4 chromium, 1 molybdenum alloy has exceptionally high creep properties, but is limited for applications to 1125F because of possible higher temperature scale exfoliation. It is listed in the ASME Boiler Code for temperatures to 1200F.

SA213-T9

A 9-chromium-1 molybdenum alloy, T9 offers very good corrosion resistance with good high-temperature strength. It also has good oxidation resistance and can be used to 1200F maximum. Some times T9 is an adequate substitute for the more expensive stainless grades. The Boiler Code limits T9 to 1200F.

BOILER TUBE GRADES

STAINLESS STEELS – Austenitic stainless steels

 
Austenitic stainless steels are presented in the ASME Boiler and Pressure Vessel Code with two sets of allowable stresses. The reason for this is their relatively low yield strength. The higher allowable stress values were determined at temperatures where the usage would be restricted by the short-time tensile properties.
The higher stresses exceed 62-1/2%, but do not exceed 90% of the yield strength. At these stresses, small amounts of plastic deformation can be expected. These higher stress values are usually used for super-heater and reheater tubing.
  The Boiler Code lists maximum allowable stresses for varying temperatures depending on the individual austenitic stainless grade.

SA213-T304

Variations of this 18 chromium, 8 nickel grade include 304L, 304LN, 304H and 304N. Each of these offers excellent corrosion and oxidation resistance along with high strength.
  High strengths are maintained in the low carbon grades by controlling the nitrogen content.
  T304 has higher carbon and a minimum solution annealing temperature to assure good long-time elevated temperature strengths. T304 grades are limited to 1650F under oxidizing conditions. Section I of the ASME Boiler Code lists allowable stresses up to 1500F.

SA213-T316

T316 is similar to T304, but offers better corrosion resistance and creep strength. The molybdenum addition to 316 increases its resistance to pitting and crevice corrosion.
Variations of this grade include 316L, 316LN, 316H and 316N.

SA213-T321
and T347

T321 and 347 are variations of T304 and have comparable minimum tensile properties. These two grades are stabilized with additions of titanium and columbian respectively, along with proper heat treatment.
To insure good long-time strength at elevated temperatures, T321H and 347H-like 304H-were developed with higher carbon contents and specified minimum solution annealing temperatures.
  Of all the stainless steels, T309 (25 chromium, 13 nickel) and T310 (25 chromium, 20 nickel) offer the maximum resistance to oxidation and corrosion. They also offer good high-temperature properties. Since these steels contain ferrite, however, they are more susceptible to sigma phase.
ASTM A213 / ASME SA213 T2, T11, T12, T22, T91, T92 Chemical Composition and Mechanical Properties :
Grade A213 / SA213 Chemical Composition%
C Si Mn P, S Max Cr Mo Ni Max V Al Max
T2 0.10~0.20 0.10~0.30 0.30~0.61 0.025 0.50~0.81 0.44~0.65
T11 0.05~0.15 0.50~1.00 0.30~0.60 0.025 1.00~1.50 0.44~0.65
T12 0.05~0.15 Max 0.5 0.30~0.61 0.025 0.80~1.25 0.44~0.65
T22 0.05~0.15 Max 0.5 0.30~0.60 0.025 1.90~2.60 0.87~1.13
T91 0.07~0.14 0.20~0.50 0.30~0.60 0.02 8.0~9.5 0.85~1.05 0.4 0.18~0.25 0.015
T92 0.07~0.13 Max 0.5 0.30~0.60 0.02 8.5~9.5 0.30~0.60 0.4 0.15~0.25 0.015
Grade A213 / SA213 Chemical Composition% Mechanical Properties
W B Nb N T. S Y. P Elongation A213 / SA213 Hardness
T2 ≥ 415MPa ≥ 205MPa ≥ 30% 163HBW(85HRB)
T11 ≥ 415MPa ≥ 205MPa ≥ 30% 163HBW(85HRB)
T12 ≥ 415MPa ≥ 220MPa ≥ 30% 163HBW(85HRB)
T22 ≥ 415MPa ≥ 205MPa ≥ 30% 163HBW(85HRB)
T91 0.06~0.10 0.03~0.07 ≥ 585MPa ≥ 415MPa ≥ 20% 250HBW(25HRB)
T92 1.50~2.00 0.001~0.006 0.04~0.09 0.03~0.07 ≥ 620MPa ≥ 440MPa ≥ 20% 250HBW(25HRB)

ASTM A213 / ASME SA213 T2, T11, T12, T22, T91, T92 Tolerance :
Outside Diameter OD Tolerance WT Tolerance Ovality Tolerance Cut Length Tolerance
OD≤ 12, 7 mm ± 0, 13 mm ± 15 % + 3, 18 mm, – 0 mm
12, 7 mm < OD ≤ 38, 1 mm ± 0, 13 mm ± 10 % max, 1, 65 mm + 3, 18 mm, – 0 mm
38, 1 mm < OD ≤ 88, 9 mm ± 0, 25 mm ± 10 % max, 2, 41 mm + 4, 76 mm, – 0 mm

ASTM A 213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes :
Trade Name A213 / SA213 Grade A213 / SA213 UNS # A213 / SA213 Heater Tubes
1 1/4 Chrome T11 K11597 A213 / SA213
2 1/4 Chrome T22 K21590 A213 / SA213
5 Chrome T5 K41545 A213 / SA213
9 Chrome T9 K90941 A213 / SA213
T91 T91 K90901 A213 / SA213
T92 T92 K92460 A213 / SA213

 

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