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ASTM A691 Pipe

Descripción general estándar: 

ASTM A691 is a standard for electric welded carbon and alloy steel pipes. It is for use in high temperature and high pressure environments. These pipes are usually made by curling and welding multiple steel plates. They have good strength and corrosion resistance.

Material principal:

Carbon steel and alloy steel materials. Common alloy steel materials include 1.25Cr-0.5Mo, 2.25Cr-1Mo, etc.

Ámbito de aplicación:

ASTM A691 pipes are widely used in the oil, gas, power, and chemical industries. They are for high-temperature, high-pressure environments, like boilers and piping systems.

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Specification of ASTM A691

EstándarASTM A691
SolicitudStandard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures
Grado de la tuberíaAlloy Steel ASTM A691 Cl22,1 CR,1/2 CR,1 1/4 CR,2 1/4 CR, 3 CR,5 CR,9 CR,91,CM 65,CM70,CM75
Class DesignationClass 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73..
ProcedimientoEFW, REG, SEAMLESS, LSAW
Outer Diameter1/2”- 36”
Espesor de paredSCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH12,0 SCH140, SCH160, XXS
Longitud del tuboSingle random length/Double random length 5m-14m,5.8m,6m,10m-12m,12m or as customer’s actual request
ToleranciaOD: +/- 0.5 % of the specified outside diameter
WT: not more than 0.01 in. (0.3 mm) under the specified nominal thickness.
Length: within −0,+1⁄2 in. (−0, +13 mm) of specified.
Superficie de la tuberíaBare,Painting black,varnished,galvanized,anti-corrosion,PE PP/EP/FBE coating
Extremo de tuberíaPlain end/Beveled,protected by plastic caps on both ends, cut quare,grooved, threaded and coupling
Technical MethodHot-rolled/Cold-drawn/Hot-expanded

Dimensión

Diámetro exterior:16 in. [405mm] or larger
Espesor de pared:hasta 75 mm [3 pulg.]
Podrán suministrarse tubos de otras dimensiones siempre que cumplan todos los demás requisitos de esta especificación.

Requisito químico

Grado de la tuberíaTipo de aceroEspecificación ASTMHB , maxA
NúmeroCalificación
CM -65carbon – molybdenum steelA204/A204MA201
CM -70carbon – molybdenum steelA204/A204MB201
CM -75carbon – molybdenum steelA204/A204MC201
CmSH -70carbon – manganese – silicon steel , normalizedA537/A537M1
CMS -75carbon – manganese – silicon steelA299/A299M
CMSH -80carbon – manganese – silicon steel , quenched and temperedA537/A537M2
1/2 CR1/2% chromium ,1/2% molybdenum steelA387/A387M2201
1CR1% chromium ,1/2% molybdenum steelA387/A387M12201
1-1/4 CR11/4% chromium ,1/2% molybdenum steelA387/A387M11201
2-1/4 CR21/4% chromium ,1% molybdenum steelA387/A387M22201
3CR3% chromium ,1% molybdenum steelA387/A387M21201
5CR5% chromium ,1/2% molybdenum steelA387/A387M5225
9CR9% chromium ,1% molybdenum steelA387/A387M9241
919% chromium ,1% molybdenum , vanadium , columbiumA387/A387M91B241
A Hardness values listed are applicable to S3.
BGrade 91 shall be designated by Type 1 or Type 2 when required by the prevalent specification .

Requisito mecánico

Grado de la tuberíaTipo de aceroEspecificación ASTMHB , maxA
NúmeroCalificación
CM -65carbon – molybdenum steelA204/A204MA201
CM -70carbon – molybdenum steelA204/A204MB201
CM -75carbon – molybdenum steelA204/A204MC201
CmSH -70carbon – manganese – silicon steel , normalizedA537/A537M1
CMS -75carbon – manganese – silicon steelA299/A299M
CMSH -80carbon – manganese – silicon steel , quenched and temperedA537/A537M2
1/2 CR1/2% chromium ,1/2% molybdenum steelA387/A387M2201
1CR1% chromium ,1/2% molybdenum steelA387/A387M12201
1-1/4 CR11/4% chromium ,1/2% molybdenum steelA387/A387M11201
2-1/4 CR21/4% chromium ,1% molybdenum steelA387/A387M22201
3CR3% chromium ,1% molybdenum steelA387/A387M21201
5CR5% chromium ,1/2% molybdenum steelA387/A387M5225
9CR9% chromium ,1% molybdenum steelA387/A387M9241
919% chromium ,1% molybdenum , vanadium , columbiumA387/A387M91B241
A Hardness values listed are applicable to S3.
BGrade 91 shall be designated by Type 1 or Type 2 when required by the prevalent specification .

¿Por qué elegir UNIASEN?

  • Welded and with the addition of filler metal. They are manufactured from pressure vessel quality plates with different analysis and strength grades. We ensure that heat treatment is performed as required to achieve the required mechanical properties. Our pipes are classified by the steel grade and heat treatment used in manufacturing.
  • UNIASEN offers ASTM A691/A691M pipes in a wide range of sizes. Our pipes are available in a variety of diameters, wall thicknesses and lengths, ensuring that we can meet your specific needs.
  • ASTM A691/A691M pipes are electro-fused. They are for high pressure, high temperature use. UNIASEN’s ASTM A691/A691M pipes come in various sizes to meet your needs.
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