Manufacturer, Supplier & Exporter of ASTM A53 Grade A Spool

ASTM A53 Grade A Spool is a versatile carbon-steel piping component widely used in low- to medium-pressure environments. Manufactured from seamless or welded carbon steel pipes under the ASTM A53 standard, Grade A provides reliable performance in many types of service lines including water, gas, steam, and general utility pipelines. Riddhi Siddhi Impex, a renowned steel-fabrication company, specializes in the production of high-quality A53 Grade A Spools tailored to the needs of Indian industry...

As a leading ASTM A53 Grade A Spool domestic supplier, Riddhi Siddhi Impex leverages its modern manufacturing infrastructure to fabricate spool assemblies with precise tolerances. The company offers a full range of spool types, such as straight spools, elbow‑spools, tees, reducers, and flanged spools. All spools undergo strict quality tests, including dimensional inspection, hydrostatic testing, and non-destructive examinations, to guarantee leak-free performance..

In cities like Mumbai, Delhi, and Bengaluru (Bangalore), where infrastructure development and pipeline projects are abundant, Riddhi Siddhi Impex maintains a strong supply network. Their A53 Grade A spools are frequently used in municipal water distribution systems and utility pipelines. The company’s ability to deliver large-volume spools quickly has made them a trusted partner for contractors working on infrastructure modernization..

Industrial hubs such as Hyderabad, Chennai, and Kolkata require spool assemblies for process piping in chemical plants, refineries, and power plants. Riddhi Siddhi Impex has positioned itself as a reliable manufacturer in these markets by providing ASTM A53 Grade A Spools with consistent wall thickness, optimal mechanical properties, and precise end-preparations (plain or beveled) for easy welding and installation...

In western and northwestern India, major cities such as Pune, Ahmedabad, Surat, Vadodara, and Rajkot are hubs of manufacturing and petrochemical activity. Riddhi Siddhi Impex supplies Grade A spools to these regions, supporting pipeline projects in fertilizer plants, oil & gas distribution units, and industrial process systems. Their local presence ensures reduced logistic costs and faster turnaround times..

ASTM A53 Grade A Spool

Specification

Property	Details
Product Name	ASTM A53 Grade A Spool
Manufacturer	Riddhi Siddhi Impex
Material	Carbon Steel
Type	Seamless / Welded
End Type	Plain End (PE) / Beveled End (BE)
Standard	ASTM A53 / ASME B36.10
Application	Pipelines, Water Supply, Steam, Oil, Gas

Chemical Composition

Element	Percentage (%)
Carbon (C)	0.25 max
Manganese (Mn)	0.29 – 1.06
Phosphorus (P)	0.06 max
Sulfur (S)	0.05 max
Silicon (Si)	0.10 – 0.30

Mechanical Properties

Property	Value
Tensile Strength	≥ 48,000 psi (330 MPa)
Yield Strength	≥ 30,000 psi (205 MPa)
Elongation	≥ 30% (in 2" gauge length)
Hardness	HRB 70-85

Dimension Chart (Nominal)

Nominal Pipe Size (NPS)	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

Equivalent Grades

Standard	Equivalent Grade
ASTM	A53 Grade A
API	5L Grade A
EN	EN 10216-1 P235GH
DIN	St 35.8

Equivalent Standards

Standard	Description
ASTM A53	Carbon Steel Pipe for Mechanical and Pressure Applications
ASME B36.10	Steel Pipe Dimensions
API 5L	Specification for Line Pipe

Other Types

Type	Description
ASTM A53 Grade B Spool	Higher strength, medium-pressure piping
ASTM A106 Grade B/C Spool	Seamless high-temperature service pipes
ERW / Welded Pipes	Electric resistance welded spools for general piping

Moreover, in strategic manufacturing and petrochemical corridors like Dahej, Vilayat, Somnath, Narmada, Ankleshwar, Navsari, Valsad, and Rajpipla, Riddhi Siddhi Impex’s A53 Grade A spools play a critical role in pipeline construction and expansion. Their quality checks, documentation, and local inventory mean minimal downtime, faster installations, and trusted performance, making them a preferred supplier for EPC contractors and industrial piping projects..

Frequently Asked Questions (FAQs)

Q1: What are the common applications of ASTM A53 Grade A Spool?

A1: It is used for water, gas, steam, oil, and general mechanical piping applications.

Q2: Can custom lengths and wall thicknesses be supplied?

A2: Yes, Riddhi Siddhi Impex provides custom spool sizes to meet project requirements.

Q3: Is ASTM A53 Grade A suitable for high-temperature service?

A3: Grade A is suitable for low- to medium-temperature applications. For high temperatures, ASTM A106 Grade B/C is recommended.

Q4: Which Indian cities are served by Riddhi Siddhi Impex?

A4: They supply domestically to Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and more.