Seamless steel pipe implementation standards

Seamless steel pipes are manufactured from solid round steel billets that are perforated to create a hollow tube with no welds on the surface, hence the name "seamless steel pipes."

Types of Seamless Steel Pipes by Production Method:

Seamless steel pipes can be categorized based on their production process into:

Hot-rolled seamless steel pipes

Cold-rolled seamless steel pipes

Cold-drawn seamless steel pipes

Extruded seamless steel pipes

Pipe jacking, among others.

Types of Seamless Steel Pipes by Section Shape:

Seamless steel pipes are classified by their cross-sectional shape into round and shaped pipes. Shaped pipes include a variety of forms such as square, oval, triangular, hexagonal, melon seed, star, finned tube, and other complex shapes. The diameter of these pipes can range from a minimum of 4mm to a maximum of 900mm.

Types of Seamless Steel Pipes by Wall Thickness:

Depending on the application, seamless steel pipes are divided into thick-walled and thin-walled types.

Applications of Seamless Steel Pipes:

Seamless steel pipes are widely used in various industries, including:

Petroleum geological drilling pipes

Petrochemical cracking pipes

Boiler furnace pipes

Bearing pipes

High-precision structural steel pipes for automobiles, tractors, and aviation.

Implementation Standards for Seamless Steel Pipes:

Universal Seamless Steel Pipe (ASTM A53 GR.B):

Steel Grade: SA53 B

Specifications: 1/4" to 28" (13.7mm to 711.2mm)

Tensile Strength: ≥ 415 MPa

Yield Strength: ≥ 240 MPa

Standard: ASTM A53 for pressure piping systems, general purpose piping, and piping used at temperatures below 350°C.

Seamless Steel Piping for High-Temperature Operation (ASTM A106 GR.B):

Steel Grade: SA106B

Specifications: 1/4" to 28" (13.7mm to 711.2mm)

Standard: ASTM A106 by the American Society for Testing and Materials (ASTM)

Mechanical Properties:

Tensile Strength: ≥ 415 MPa

Yield Strength: ≥ 240 MPa

Chemical Composition:

Carbon (C): ≤ 0.30%

Silicon (Si): ≥ 0.10%

Manganese (Mn): 0.29–1.06%

Phosphorus (P): ≤ 0.035%

Sulfur (S): ≤ 0.035%

Chromium (Cr): ≤ 0.40%

Molybdenum (Mo): ≤ 0.15%

Copper (Cu): ≤ 0.40%

Nickel (Ni): ≤ 0.40%

Vanadium (V): ≤ 0.08%

Line Pipe (API SPEC 5L):

Steel Grades: B, X42, X46, X52

Specifications: 1/4" to 28" (13.7mm to 711.2mm)

Additional Standards for Seamless Steel Pipes:

ASTM A53: Seamless and welded black steel pipes and hot-dip galvanized steel pipes.

ASTM A106: Carbon steel seamless pipes for high-temperature operation.

ASTM A178/A178M: Resistance welded carbon steel and carbon-manganese steel boiler tubes.

ASTM A179/A179M: Seamless cold-drawn low-carbon steel heat exchanger and condenser tubes.

ASTM A192/A192M: Carbon steel seamless boiler tubes for high-pressure service.

ASTM A199/A199M: Medium alloy steel cold-drawn seamless tubes for heat exchangers and condensers.

ASTM A209/A209M: Carbon steel seamless tubes for boilers and superheaters under high pressure.

ASTM A210/210M: Medium-carbon steel seamless tubes for boilers and superheaters.

ASTM A333/A333M: Seamless and welded steel pipes for low-temperature service.

ASTM A500/A500M: Cold-formed welded and seamless carbon steel structural tubes for round and shaped sections.