ASTM A53 Grade B Black Steel Pipe

Specification

Item	ASTM A53 Grade B Black Steel Pipe
Standard	ASTM A53 / ASME SA53
Material	Grade B
Type	Type E, Type S
Surface Treatment	Hot-rolled with oxide scale condition / Can be oiled for rust prevention
Cross-sectional Shape	Round
Outer Diameter	1/8″ – 26″ (DN6 – DN650) / 10.3mm – 660mm
Wall Thickness	Sch 10 – Sch 160, STD, XS, XXS (1.2mm – 50mm+)
Length	6m, 12m
Processing Services	Cutting, chamfering, threading, bending, welding, drilling, painting

What are its advantages?

• Low Cost: Mature manufacturing process and low raw material prices, combined with excellent mechanical properties, eliminate the need for frequent replacements, resulting in high cost-effectiveness.
• Superior Machining Performance: Can be produced via resistance welding (ERW) or seamless processes. The pipe ends can undergo various processing, and the pipe body supports secondary processing such as cold bending, hot welding, and stamping.
• Superior Mechanical Properties: Its tensile and yield strength ensure reliable transportation of medium- and low-pressure fluids such as water, oil, natural gas, and steam. It can also be used for structural support, piling, etc., offering wear and impact resistance.
• Flexible Customization: Outer diameters from 1/2″ to 26″, wall thicknesses supporting SCH 10/SCH 40/SCH 80 series, etc., to meet different pressure rating requirements.

Mechanical properties and chemical composition

Mechanical properties

Tensile strength	≥ 415 MPa (60,000 psi)
Yield strength	≥ 240 MPa (35,000 psi)
Elongation	≥ 30% (gauge length 2 inches, depending on wall thickness)
Hardness	≤ 85 HRB

Chemical composition

C	≤ 0.30%
Mn	≤ 1.20%
P	≤ 0.05%
S	≤ 0.045%

Common specifications and weight

Nominal size NPS	OD (mm)	WT Sch 40 (mm)	WT Sch 80 (mm)	Weight Sch 40 (kg/m)	Weight Sch 80 (kg/m)
1/2″	21.3	2.77	3.73	1.27	1.62
3/4″	26.7	2.87	3.91	1.68	2.20
1″	33.4	3.38	4.55	2.50	3.24
1-1/2″	48.3	3.68	5.08	4.05	5.41
2″	60.3	3.91	5.54	5.44	7.48
3″	88.9	5.49	7.62	11.29	15.27
4″	114.3	6.02	8.56	16.07	22.32
6″	168.3	7.11	10.97	28.26	42.56
8″	219.1	8.18	12.70	42.55	64.64
10″	273.1	9.27	15.09	60.31	96.23

Weight Formula Explanation:

W(kg/m) = 0.0246615 × (OD − WT) × WT

Application Areas

1. Medium and Low Pressure Fluid Transportation: Widely used in pipelines for medium and low-pressure fluids such as water, gas, steam, and compressed air. Suitable for municipal water supply, gas distribution, boiler rooms, compressed air systems, etc.
2. Structural Support: Applicable to bridges, building frames, pile foundations, and machinery manufacturing. Used as scaffolding, guardrails, stair handrails, equipment frames, piling, billboard poles, etc.
3. Industry and Infrastructure: Used in HVAC engineering and electrical engineering, such as fire sprinkler systems, electrical conduits, equipment supports, municipal water supply and drainage, etc.
4. Agriculture and Municipal Engineering: Used in farmland irrigation networks, greenhouse steel structures, livestock fencing, and public facilities such as urban water supply and drainage, fire water supply, and street light poles.

Advantages Compared to Other Standards

1. Compared to ASTM A106: A53 Grade B allows for welded (ERW) pipe, resulting in lower costs; while A106 is limited to seamless pipe and is suitable for high-temperature and high-pressure applications (such as steam pipelines).
2. Compared to API 5L: A53 Grade B focuses more on general fluid transportation, while API 5L is specifically designed for long-distance oil and gas pipelines and has higher requirements for low-temperature toughness.
3. Compared to domestic standards: Equivalent to domestic 20# steel, but ASTM A53’s global certification makes it more widely used in international projects.

Selection and Maintenance Recommendations

Key Selection Points

1. Choose a reputable manufacturer to ensure compliance with ASTM A53/A53M standards. For example, Glory Steel in China is an ISO9001 certified, reasonably priced gold-level supplier.
2. Select based on application: For general structural/decorative applications, standard A53 Gr.B black pipe is sufficient; for industrial piping/high-pressure applications, A53 Gr.B seamless steel pipe is recommended for its stronger pressure resistance and higher safety.
3. Select based on environment and budget: For corrosive environments, A53 Gr.B HDG hot-dip galvanized steel pipe is recommended; for dry environments and limited budgets, standard A53 Gr.B black steel pipe is recommended.

Maintenance Precautions

1. Inspect the pipe appearance and connections every 3-6 months, promptly cleaning dust and repairing corrosion or leaks.
2. Keep the pipes clean and dry to prevent internal scaling or external electrochemical corrosion.
3. Avoid collisions during transportation and installation; install protective caps at the ends to prevent damage.

Strict Quality Control

Every ASTM A53 Gr.B black pipe undergoes rigorous testing before leaving the factory to ensure quality standards are met:

• Dimensional Inspection: Precisely check outer diameter, wall thickness, ovality, and length tolerances.
• Non-destructive Testing: ERW pipes undergo eddy current testing (ECT), and seamless pipes undergo ultrasonic testing (UT) to ensure no welding defects, such as cracks or slag inclusions.
• Hydrostatic Testing: 100% pass hydrostatic pressure testing to verify no leakage.
• Available certifications: ISO 9001, CE, BV, SGS Test Report, EN 10204 3.1 MTC (Mill Test Certificate).

Packaging & Delivery: Standard Sea Freight Packaging

• Inner Layer: Steel pipes with plastic/rubber caps at both ends to protect the pipe ends and threads.
• Middle Layer: Complete waterproof membrane wrapping for moisture and rust prevention.
• Outer Layer: Steel strapping with wooden planks in between to prevent scratches and friction during transport.
• Marking: Clearly painted specifications, furnace number, and standard number for easy customs inspection.
• Delivery Time: Shipped to Tianjin Port within 15-25 days after receiving the deposit.

Why Choose Glory Steel?

• Quality Assurance: Strictly adheres to ASTM A53 international standards, with all tests meeting requirements. A complete set of certification documents is available to meet the procurement needs of various engineering projects worldwide.
• Timely Delivery: Multiple ERW/seamless production lines maintain a large stock of A53 Gr. B black and galvanized tubing. Covering all sizes from 1/2″ to 26″, bulk orders are delivered on time.
• Customized Services: Supports one-stop processing services, including chamfering, threading (NPT/BSP), painting, plastic coating, and pipe bending.
• Factory Pricing: Direct sales from the source factory, eliminating middlemen and offering fair prices. Comprehensive after-sales technical support is also provided, reducing your operating costs.

FAQs

Glory Steel factory, located in Tianjin, China, is an ISO 9001, ISO 14001, and CE certified factory with an annual output of 100,000 tons. We specialize in manufacturing ASTM A53 Grade B Galvanized Steel Pipes, ASTM A106 Grade B Seamless Carbon Steel Pipes, API 5L Grade B/X42/X52 Line Pipes. With our high-quality products and services, we export to over 120 countries.