LSAW (Longitudinal Submerged Arc Welded) steel pipes are commonly used in various applications, including oil and gas transmission, structural support, and water transportation. The standard grades of LSAW Steel Pipes often follow specifications set by international standards organizations or specific industry requirements.

Common standard grades of LSAW steel pipes

1. API 5L: The American Petroleum Institute (API) sets standards for the manufacture of steel pipes used in the oil and gas industry. Common grades of LSAW steel pipes under API 5L include:

API 5L A: Grade A steel pipe.

API 5L B: Grade B steel pipe.

API 5L X42: Minimum yield strength of 42,000 psi.

API 5L X52: Minimum yield strength of 52,000 psi.

API 5L X60: Minimum yield strength of 60,000 psi.

API 5L X65: Minimum yield strength of 65,000 psi.

API 5L X70: Minimum yield strength of 70,000 psi.

2. EN 10219: European standard for cold-formed welded structural hollow sections of non-alloy and fine grain steels. Common grades include:

S235JRH: Yield strength of 235 MPa.

S275J0H: Yield strength of 275 MPa.

S355J2H: Yield strength of 355 MPa.

3. ASTM A252: Standard specification for welded and seamless steel pipe piles. Grades under this specification include:

Grade 1: Yield strength of 30,000 psi.

Grade 2: Yield strength of 35,000 psi.

Grade 3: Yield strength of 45,000 psi.

4. DIN 2458: German standard for welded steel pipes in unalloyed and low alloy steels. Common grades include:

St37.0: Standard grade for general purposes.

St44.0: Higher strength steel grade.

St52.0: Higher strength steel grade.

5. GB/T 9711: Chinese standard for pipeline steel pipe. Common grades include:

L175: Minimum yield strength of 175 MPa.

L210: Minimum yield strength of 210 MPa.

L245: Minimum yield strength of 245 MPa.

L290: Minimum yield strength of 290 MPa.

L360: Minimum yield strength of 360 MPa.

L415: Minimum yield strength of 415 MPa.

6. JIS G3457: Japanese Industrial Standard for carbon steel pipes for high-pressure service. Common grades include:

STPY400: Yield strength of 400 MPa.

STPY41: Yield strength of 41,000 psi.

7. BS 3601: British Standard for carbon steel pipes and tubes with specified room temperature properties. Common grades include:

430: Yield strength of 430 MPa.

360: Yield strength of 360 MPa.

8. ISO 3183: International Organization for Standardization specification for line pipe. Common grades include:

ISO 3183 L175: Minimum yield strength of 175 MPa.

ISO 3183 L245: Minimum yield strength of 245 MPa.

ISO 3183 L360: Minimum yield strength of 360 MPa.

9. EN 10217: European standard for welded steel tubes for pressure purposes. Common grades include:

P195: Yield strength of 195 MPa.

P235: Yield strength of 235 MPa.

P265: Yield strength of 265 MPa.

10. AS/NZS 1163: Australian and New Zealand standard for structural steel hollow sections. Common grades include:

AS/NZS 1163 C250: Minimum yield strength of 250 MPa.

AS/NZS 1163 C350: Minimum yield strength of 350 MPa.

AS/NZS 1163 C450: Minimum yield strength of 450 MPa.

11. CSA Z245.1: Canadian standard for steel line pipe. Common grades include:

Gr. 241: Yield strength of 241 MPa.

Gr. 290: Yield strength of 290 MPa.

Gr. 359: Yield strength of 359 MPa.

12. DIN 1626: German standard for welded circular tubes of non-alloy steels with special quality requirements. Common grades include:

St37.0: Yield strength of 235 MPa.

St44.0: Yield strength of 275 MPa.

St52.0: Yield strength of 355 MPa.

13. EN 10208: European standard for steel pipes for pipelines for combustible fluids. Common grades include:

L210GA: Minimum yield strength of 210 MPa.

L245GA: Minimum yield strength of 245 MPa.

L290GA: Minimum yield strength of 290 MPa.

14. JIS G3466: Japanese Industrial Standard for carbon steel square and rectangular tubes. Common grades include:

STKR400: Yield strength of 400 MPa.

STKR490: Yield strength of 490 MPa.

15. ASTM A671: Standard specification for electric-fusion-welded steel pipe for atmospheric and lower temperatures. Common grades include:

CA55: Yield strength of 55,000 psi.

CB60: Yield strength of 60,000 psi.

CC70: Yield strength of 70,000 psi.

16. KS D 3566: Korean Industrial Standard for carbon steel welded H-shaped steel. Common grades include:

SHS: Square Hollow Section.

RHS: Rectangular Hollow Section.

17. EN 10210: European standard for hot-finished structural hollow sections of non-alloy and fine grain steels. Common grades include:

S235JRH: Yield strength of 235 MPa.

S275J0H: Yield strength of 275 MPa.

S355J2H: Yield strength of 355 MPa.

These standard grades of LSAW steel pipes adhere to specific requirements set by different standards organizations and are used in various applications across industries such as oil and gas, construction, infrastructure, and manufacturing. The selection of the appropriate grade depends on factors like operating conditions, structural requirements, and material properties needed for the intended application.

Features and differences among the standard grades of LSAW Steel Pipes

Here are some features and differences among the standard grades of LSAW (Longitudinal Submerged Arc Welded) steel pipes mentioned earlier:

1. API 5L:

Features: Designed for use in the oil and gas industry, these pipes come in various grades with different yield strengths. They are known for their high performance and reliability.

Differences: Grades like X42, X52, X60, X65, and X70 vary in terms of minimum yield strength, making them suitable for different operating conditions.

2. EN 10219:

Features: Designed for cold-formed welded structural hollow sections, these pipes offer good formability and weldability for structural applications.

Differences: Grades like S235JRH, S275J0H, and S355J2H differ in terms of yield strength, allowing for selection based on structural requirements.

3. ASTM A252:

Features: Specifically for steel pipe piles, these pipes are used in deep foundations and marine construction projects.

Differences: Grades 1, 2, and 3 vary in terms of yield strength, with Grade 3 offering higher strength for demanding applications.

4. DIN 2458:

Features: German standard for welded steel pipes, offering reliable performance and quality.

Differences: Grades like St37.0, St44.0, and St52.0 differ in strength and composition, suitable for various applications.

5. GB/T 9711:

Features: Chinese standard for pipeline steel pipes, providing options for different pressure and temperature requirements.

Differences: Grades like L175, L210, L245, L290, L360, and L415 vary in strength levels for specific pipeline applications.

6. JIS G3457:

Features: Designed for high-pressure service applications, these pipes conform to Japanese industrial standards.

Differences: Grades like STPY400 and STPY41 vary in terms of yield strength, catering to different pressure requirements.

7. BS 3601:

Features: British standard for carbon steel pipes with specified room temperature properties, ensuring suitability for various applications.

Differences: Grades such as 430 and 360 differ in terms of yield strength and specific properties required for different applications.

8. ISO 3183:

Features: International standard for line pipes, ensuring quality and performance in the transportation of liquids or gases.

Differences: Grades like L175, L245, and L360 offer different yield strengths and toughness levels for specific pipeline requirements.

9. EN 10217:

Features: European standard for welded steel tubes for pressure purposes, providing options for various pressure applications.

Differences: Grades such as P195, P235, and P265 differ in yield strength and suitability for different pressure conditions.

10. AS/NZS 1163:

Features: Australian and New Zealand standard for structural steel hollow sections, offering options for structural applications.

Differences: Grades like C250, C350, and C450 vary in yield strength, facilitating the selection of appropriate materials for structural designs.

11. CSA Z245.1:

Features: Canadian standard for steel line pipes, ensuring quality and performance in the transportation of fluids in various industries.

Differences: Grades such as Gr. 241, Gr. 290, and Gr. 359 differ in yield strength, meeting specific requirements for different pipeline applications.

Each standard grade of LSAW steel pipes has unique features and differences, making them suitable for distinct applications based on factors such as strength requirements, operating conditions, and industry standards. It's important to select the appropriate grade that aligns with the specific needs of the project to ensure optimal performance and durability.