Manufacturer, Supplier & Exporter of ASTM A53 Grade B Spool

ASTM A53 Grade B Spool is a highly reliable carbon steel piping component designed for moderate-pressure applications across a wide range of industries. The spool is typically made from seamless or welded steel pipes conforming to the ASTM A53 Grade B specification, which ensures strong mechanical performance and durability. Riddhi Siddhi Impex, an established steel fabrication company, specializes in manufacturing these spools with precision and quality control, making them a trusted ASTM A53 Grade B Spool domestic supplier..

Riddhi Siddhi Impex offers a comprehensive portfolio of spool assemblies under the A53 Grade B standard, including straight spools, elbow spools, tee spools, reducer spools, and custom-fabricated spools. These spools are prefabricated in their state-of-the-art fabrication facility, using modern CNC cutting machines, automatic welders, and rigorous testing protocols such as hydrostatic testing and dimensional inspections to guarantee leak-free performance..

In key metropolitan hubs such as Mumbai, Delhi, and Bengaluru (Bangalore), Riddhi Siddhi Impex has a strong presence as a domestic supplier. Their A53 Grade B spools are widely used in infrastructure projects, water pipelines, and general industrial piping systems. The company ensures timely deliveries to EPC contractors, fabrication yards, and project sites within these cities, helping minimize project timelines and logistical complexity...

In southern and eastern India, cities like Hyderabad, Chennai, and Kolkata often require spool assemblies for chemical plants, steam lines, and utility systems. Riddhi Siddhi Impex supports these regions by supplying Grade B spools with strong weldability, consistent wall thickness, and optimal mechanical strength, fulfilling specifications needed for process control, safety, and longevity under industrial conditions..

Similarly, in western and central industrial zones including Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, and Bhopal, Riddhi Siddhi Impex’s spool fabrication capabilities are in high demand. Manufacturers and EPC contractors in these regions rely on A53 Grade B Spools for critical fluid transport pipelines in refineries, chemical plants, and water-supply networks..

ASTM A53 Grade B Spool

Specification

Product Name	ASTM A53 Grade B Spool
Manufacturer	Riddhi Siddhi Impex
Material	Carbon Steel
Standard	ASTM A53 Grade B
Pipe Type	Seamless / Welded
Size Range	1/2" NB to 48" NB
Wall Thickness	Sch 10 to Sch 160 / XXS
Length	Single Random, Double Random, or Cut Length
End Type	Plain End (PE), Beveled End (BE), Threaded
Application	Oil & Gas, Water Supply, Chemical Transport, Steam & Process Lines

Chemical Composition

Element	Content (%)
Carbon (C)	0.30 Max
Manganese (Mn)	0.29 – 1.06
Phosphorus (P)	0.05 Max
Sulfur (S)	0.05 Max
Silicon (Si)	0.10 – 0.35
Copper (Cu)	0.40 Max
Nickel (Ni)	0.40 Max
Chromium (Cr)	0.40 Max

Mechanical Properties

Property	Value
Tensile Strength	415 – 540 MPa
Yield Strength (0.2% offset)	240 MPa Min
Elongation	20% Min
Hardness	≤ 95 HRB

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
1/2"	21.3	2.77	Up to 12 m
1"	33.4	3.38	Up to 12 m
2"	60.3	3.91	Up to 12 m
4"	114.3	6.02	Up to 12 m
6"	168.3	7.11	Up to 12 m
10"	273.1	9.27	Up to 12 m
16"	406.4	12.70	Up to 12 m

Equivalent Grades

Standard	Grade
ASTM	A53 Grade B / A106 Grade B
API	5L Grade B / X42 / X52
EN	EN 10216 / EN 10224
DIN	St 37.2 / St 52.3
BS	3601 / 3602

Equivalent Standards

Standard	Description
ASTM A53	Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
API 5L	Specification for Line Pipe
EN 10216 / EN 10224	Seamless and Welded Steel Tubes
DIN 2448 / DIN 2458	Steel Pipes for Pressure Purposes

Other Types

Type	Description
ASTM A106 Spool	High-temperature carbon steel spools for process piping
ASTM A333 Spool	Low-temperature carbon steel spools for cryogenic applications
Galvanized Steel Spool	Carbon steel spools with corrosion-resistant zinc coating
3LPE/3LPP Coated Spool	Polyethylene or polypropylene coated spools for underground pipelines

In the northern region around Amritsar and Chandigarh, as well as in southern centers such as Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, and Madurai, Riddhi Siddhi Impex facilitates the availability of A53 Grade B Spools for utility piping, boiler feed lines, and industrial fluid-network systems. Their ability to manufacture and supply locally triggers cost and time efficiencies for construction and maintenance tasks in these areas.

Frequently Asked Questions (FAQs)

Q1: What industries use ASTM A53 Grade B Spools?

A1: It is widely used in oil & gas pipelines, water supply networks, chemical transport, steam lines, and general industrial applications.

Q2: Can Riddhi Siddhi Impex provide custom spool dimensions?

A2: Yes, custom diameters, wall thicknesses, lengths, and end preparations are available as per client requirements.

Q3: Are ASTM A53 Grade B Spools suitable for high-temperature applications?

A3: Yes, these spools can handle moderate-pressure and temperature applications, but for extreme temperatures, ASTM A106 may be preferred.

Q4: Do you provide spools to cities outside major metros?

A4: Yes, Riddhi Siddhi Impex supplies A53 Grade B spools to domestic cities across India including Mumbai, Delhi, Bengaluru, Chennai, Hyderabad, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and more.