ASTM A691 Seamless Pipes

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ASTM A691 Seamless Pipes Specification

End Protector
Plastic Caps

Connection
Welded, Screwed

Surface Finish
Polished

Tolerance
1%

Application
Oil & Gas Industry, Petrochemical, Power Plant, Boiler, Piping

Product Type
Seamless Pipes

Material
Alloy Steel

Section Shape
Round

Standard
ASTM A691

Technique
Cold Drawn

Surface Treatment
Black Painted, Anti-corrosion Coated

Alloy or Not
Alloy

Outer Diameter
1/2 inch to 24 inch

Thickness
3 mm to 40 mm

Size
Customizable

Length
Up to 12 meters or as required

About ASTM A691 Seamless Pipes

What Are Specification ASTM A691 Seamless Pipes?

Grade	Alloy Steel ASTM A691 Cl22, A691 GRADE 1 CR, GRADE 1/2 CR, GRADE 1 1/4 CR, GRADE 2 1/4 CR, GRADE 3 CR, GRADE 5 CR, GRADE 9 CR, GRADE 91, CM 65, CM 70, CM 75
Size	1/2 NB to 36 NB
Thickness	3-12mm
Schedules	SCH5, SCH10, SCH10S, SCH20, SCH30, SCH40, SCH40S, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
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
ASTM A691 Grades	ASTM A691 Gr 11, ASTM A691 Gr.91, ASTM A691 9cr, ASTM A691 5cr, ASTM A691 1 1/4cr Cl22, ASTM A691m, ASTM A691 Gr.5cr Cl22, ASTM A691 Cm70, ASTM A691 Class 22, ASTM A691 Class 42, ASTM A691-91, ASTM A691 Grade 2.1/4cr, ASTM A691 11/4cr Cl22
Origin	European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material)
Tolerance	Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm
Craft	Cold rolled and Cold drawn
Type	Seamless / ERW / Welded / Fabricated / LSAW Pipes
available in Form of	Round, Square, Rectangular, Hydraulic Etc.
Length	Standard Double & In Cut length also.
End	Plain End, Beveled End, Treaded
Specialized in	Large Diameter ASTM A691 Pipe
Additional Testing	NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Application	Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

Equivalent material Of ASTM A691 Seamless Pipes?

Pipe Grade	Type of Steel	ASTM Specification		HB, max
Pipe Grade	Type of Steel	Number	Grade	HB, max
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
1 CR	1 % chromium, 1/2 % molybdenum steel	A387/A387M	12	201
1 1/4 CR	1 1/4 % chromium, 1/2 % molybdenum steel	A387/A387M	11	201
2 1/4 CR	2 1/4 % chromium, 1 % molybdenum steel	A387/A387M	22	201
3 CR	3 % chromium, 1 % molybdenum steel	A387/A387M	21	201
5 CR	5 % chromium, 1/2 % molybdenum steel	A387/A387M	5	225
9 CR	9 % chromium, 1 % molybdenum steel	A387/A387M	9	241
91	9 % chromium, 1 % molybdenum, vanadium, columbium	A387/A387M	91	241

Chemical Composition Of ASTM A691 Seamless Pipes?

	1CR	1-1/4CR	2-1/4 CR	5 CR	9 CR	91
C	0.05-0.17	0.05-0.17	0.05-0.15	0.15	0.15	0.08-0.12
Mn	0.40-0.65	0.40-0.65	0.30-0.60	0.30-0.60	0.30-0.60	0.30-0.60
P	0.025	0.025	0.025	0.025	0.025	0.020
S	0.025	0.025	0.025	0.025	0.025	0.010
Si	0.15-0.40	0.50-0.80	0.50	0.50	1.00	0.20-0.50
Cr	0.80-1.15	1.00-1.50	2.00-2.50	4.00-6.00	8.00-10.00	8.00-9.50
Mo	0.45-0.60	0.45-0.65	0.90-1.10	0.45-0.65	0.90-1.10	0.85-1.05
V					0.04	0.18-0.25

Mechanical Properties Of ASTM A691 Seamless Pipes?

Class	Heat Treatment on Pipe Section see:	Radiography, see Section	Pressure Test, see :
10	none	none	none
11	none	9	none
12	none	9	8.3
13	none	none	8.3
21	stress relieved, see 6.3.1	none	none
21	stress relieved, see 6.3.1	9	none
ASTM A691 Class 22	stress relieved, see 6.3.1	9	8.3
23	stress relieved, see 6.3.1	none	8.3
31	normalized, see 6.3.2	none	none
31	normalized, see 6.3.2	9	none
32	normalized, see 6.3.2	9	8.3
33	normalized, see 6.3.2	none	8.3
40	normalized and tempered, see 6.3.3	none	none
43	normalized and tempered, see 6.3.3	9	none
43	normalized and tempered, see 6.3.3	9	8.3
43	normalized and tempered, see 6.3.3	none	8.3
50	quenched and tempered, see 6.3.4	none	none
51	quenched and tempered, see 6.3.4	9	none
52	quenched and tempered, see 6.3.4	9	8.3
53	quenched and tempered, see 6.3.4	none	8.3
60	normalized and precipitation heat none none treated	none	none
61	normalized and precipitation heat none none treated	9	none
62	normalized and precipitation heat none none treated	9	8.3
63	normalized and precipitation heat none none treated	none	8.3
70	normalized and precipitation heat none none treated	none	none
71	normalized and precipitation heat none none treated	9	none
72	normalized and precipitation heat none none treated	9	8.3
73	normalized and precipitation heat none none treated	none	8.3

Versatile Pipe Solutions for Industrial Demands

ASTM A691 Seamless Pipes are engineered to cater to a diverse range of industries, including oil & gas, petrochemical, and power generation. With customizable dimensions and grades, these pipes provide exceptional versatility, resilience, and performance in high-pressure, high-temperature environments. Manufactured and supplied throughout India, these pipes are packaged as per customer preference, ensuring safe handling and delivery.

Stringent Quality Assurance and Testing

Each ASTM A691 Seamless Pipe undergoes comprehensive quality testing, including ultrasonic, hydrostatic pressure, and eddy current inspections, to guarantee structural integrity and compliance with international standards. This ensures the pipes deliver dependable long-term service, even in challenging operational conditions, making them a trusted choice for critical infrastructure projects.

FAQs of ASTM A691 Seamless Pipes:

Q: How are ASTM A691 Seamless Pipes tested for quality and reliability?

A: ASTM A691 Seamless Pipes are subjected to ultrasonic testing, hydrostatic pressure tests, and eddy current testing to ensure they meet strict quality standards. These methods help detect internal and surface defects, confirm pressure tolerance, and verify structural integrity, ensuring the pipes deliver reliable performance in demanding applications.

Q: What sizes and specifications are available for ASTM A691 Seamless Pipes?

A: Our seamless pipes can be customized in terms of outer diameter (ranging from 1/2 inch to 24 inches), thickness (3 mm to 40 mm), and length (up to 12 meters or as required). Additional specifications, such as surface finish, tolerance (1%), and connection type (welded or screwed), are also available to suit client needs.

Q: When should ASTM A691 Seamless Pipes be used in industrial projects?

A: ASTM A691 Seamless Pipes are ideal for usage in oil & gas, petrochemical plants, power plants, boilers, and general piping systems where superior strength, heat resistance, and longevity are crucial. Their robust construction and special alloy make them suited for high-pressure and corrosive environments.

Q: Where are ASTM A691 Seamless Pipes dispatched from?

A: The pipes are dispatched from ports specified by the customer, providing flexibility and convenience in logistics. As an exporter, manufacturer, supplier, and trader based in India, we cater to both domestic and international shipping requirements.

Q: What process is followed for the heat treatment of these pipes?

A: The pipes are heat-treated through normalization and tempering processes. This improves their mechanical properties, enhances strength, and increases resistance to wear and corrosion, making them well-suited for harsh industrial conditions.

Q: How are ASTM A691 Seamless Pipes packaged for delivery?

A: Pipes are packaged either in bundles, loose, or according to specific customer requests. Every pipe typically comes with plastic cap end protectors to prevent damage during handling and transit, ensuring the product reaches you in optimal condition.

Q: What are the benefits of choosing ASTM A691 Seamless Pipes for critical applications?

A: These pipes provide outstanding durability, corrosion resistance, and adaptability to custom specifications. Their rigorous quality control and specialized material properties ensure consistent and reliable operation in the most demanding environments, supporting a wide range of industrial applications.

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