ASTM A691 Carbon and Alloy Steel Pipe Specification

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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

Estándar	ASTM A691
Solicitud	Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures
Grado de la tubería	Alloy 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 Designation	Class 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..
Procedimiento	EFW, REG, SEAMLESS, LSAW
Outer Diameter	1/2”- 36”
Espesor de pared	SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH12,0 SCH140, SCH160, XXS
Longitud del tubo	Single random length/Double random length 5m-14m,5.8m,6m,10m-12m,12m or as customer’s actual request
Tolerancia	OD: +/- 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 tubería	Bare,Painting black,varnished,galvanized,anti-corrosion,PE PP/EP/FBE coating
Extremo de tubería	Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved, threaded and coupling
Technical Method	Hot-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 tubería	Tipo de acero	Especificación ASTM		HB , maxA
Grado de la tubería	Tipo de acero	Número	Calificación	HB , maxA
CM -65	carbon – molybdenum steel	A204/A204M	A	201
CM -70	carbon – molybdenum steel	A204/A204M	B	201
CM -75	carbon – molybdenum steel	A204/A204M	C	201
CmSH -70	carbon – manganese – silicon steel , normalized	A537/A537M	1
CMS -75	carbon – manganese – silicon steel	A299/A299M	–	–
CMSH -80	carbon – manganese – silicon steel , quenched and tempered	A537/A537M	2	–
1/2 CR	1/2% chromium ,1/2% molybdenum steel	A387/A387M	2	201
1CR	1% chromium ,1/2% molybdenum steel	A387/A387M	12	201
1-1/4 CR	11/4% chromium ,1/2% molybdenum steel	A387/A387M	11	201
2-1/4 CR	21/4% chromium ,1% molybdenum steel	A387/A387M	22	201
3CR	3% chromium ,1% molybdenum steel	A387/A387M	21	201
5CR	5% chromium ,1/2% molybdenum steel	A387/A387M	5	225
9CR	9% chromium ,1% molybdenum steel	A387/A387M	9	241
91	9% chromium ,1% molybdenum , vanadium , columbium	A387/A387M	91B	241
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 tubería	Tipo de acero	Especificación ASTM		HB , maxA
Grado de la tubería	Tipo de acero	Número	Calificación	HB , maxA
CM -65	carbon – molybdenum steel	A204/A204M	A	201
CM -70	carbon – molybdenum steel	A204/A204M	B	201
CM -75	carbon – molybdenum steel	A204/A204M	C	201
CmSH -70	carbon – manganese – silicon steel , normalized	A537/A537M	1
CMS -75	carbon – manganese – silicon steel	A299/A299M	–	–
CMSH -80	carbon – manganese – silicon steel , quenched and tempered	A537/A537M	2	–
1/2 CR	1/2% chromium ,1/2% molybdenum steel	A387/A387M	2	201
1CR	1% chromium ,1/2% molybdenum steel	A387/A387M	12	201
1-1/4 CR	11/4% chromium ,1/2% molybdenum steel	A387/A387M	11	201
2-1/4 CR	21/4% chromium ,1% molybdenum steel	A387/A387M	22	201
3CR	3% chromium ,1% molybdenum steel	A387/A387M	21	201
5CR	5% chromium ,1/2% molybdenum steel	A387/A387M	5	225
9CR	9% chromium ,1% molybdenum steel	A387/A387M	9	241
91	9% chromium ,1% molybdenum , vanadium , columbium	A387/A387M	91B	241
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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