ASTM A53 Seamless Steel Pipe is manufactured without a welding seam, offering superior structural integrity and uniformity. It is produced through hot-working processes, with optional cold finishing, making it ideal for high-pressure environments and critical industrial applications where weld integrity might be a concern.
Products Description
|
Product |
ASTM A53 Seamless Steel Pipe |
| Process | Hot-Rolled,Cold Drawn |
| Material Grade | Gr A , Gr B |
| Size Range | OD 1/2"~36"(21.3~914mm), Thickness 0.055"~2"(1.65~50mm) |
| Pipe Length | 5.8m, 6m,12m,as requirement |
| Pipe Ends | Plain, Bevel, Threading and coupling, Grooved |
| Surface Treatment | bare, black paint, anti-rust oil,galvanized |
| Application | oil , gas, water transportations, industires, Structure. |
Manufacturing Process
ASTM A53 Seamless Steel pipes are produced using two primary methods, each offering distinct advantages:
Hot-Rolled Seamless Pipe
Process: Solid steel billets are heated to 1100°C–1250°C, pierced to form a hollow tube, and then rolled and sized.
Characteristics: High production efficiency, suitable for large-diameter and thick-walled pipes. Surface roughness may be slightly higher compared to cold-drawn tubes.
Application: General industrial piping, structural supports, and large-scale fluid transport.
Cold-Drawn Seamless Pipe
Process: Hot-finished tubes undergo further processing including annealing, pickling, and multi-pass cold drawing to achieve precise dimensions.
Characteristics: Superior dimensional accuracy (OD tolerance ±0.1mm), excellent surface finish, and enhanced mechanical properties due to work hardening.
Application: Hydraulic cylinders, precision machinery parts, and small-diameter thin-walled tubes requiring tight tolerances.
Chemical Composition
The maximum percentages for key elements are as follows :
| Element | Grade A, max (%) | Grade B, max (%) |
|---|---|---|
| Carbon (C) | 0.25 | 0.30 |
| Manganese (Mn) | 0.95 | 1.20 |
| Phosphorus (P) | 0.05 | 0.05 |
| Sulfur (S) | 0.045 | 0.045 |
| Copper (Cu)* | 0.40 | 0.40 |
| Nickel (Ni)* | 0.40 | 0.40 |
| Chromium (Cr)* | 0.40 | 0.40 |
| Molybdenum (Mo)* | 0.15 | 0.15 |
| Vanadium (V)* | 0.08 | 0.08 |
*Note: The total composition for these five alloying elements (Cu, Ni, Cr, Mo, V) shall not exceed 1.00%.
Mechanical Properties
The primary distinction between Grade A and Grade B lies in their mechanical strength, making Grade B the choice for higher-stress applications.
| Property | Grade A, minimum | Grade B, minimum |
|---|---|---|
| Tensile Strength | 48,000 psi (330 MPa) | 60,000 psi (415 MPa) |
| Yield Strength | 30,000 psi (205 MPa) | 69,000 psi (240 MPa) |
Surface Treatments
While the base material is carbon steel, ASTM A53 pipes can be supplied with different surface finishes to enhance performance:
Black Steel: Uncoated, featuring a dark oxide finish from manufacturing. Cost-effective for indoor or protected environments.
Hot-Dipped Galvanized: Coated with zinc (minimum 1.8 oz/ft²) to provide superior corrosion resistance. Ideal for outdoor, underground, or humid environments. Note: Galvanized pipes are not recommended for high-temperature applications (>390°F) as the zinc coating may degrade
Quality control
* Hydrostatic Pressure Testing
* Non-Destructive Testing (Eddy Current, Ultrasonic)
* Chemical composition test
* Mechanical Property Testing
* Dimension & Visual Inspection
* Full Traceability (Mill Test Certificates 3.1 provided)
Welcome to inquire
Kevin
Tianjin shenzhoutong steel pipe co.,ltd
kevin@tjshenzhoutong.com
Mob/whatsapp/wechat +86 15267768016
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