Manufacturer, Supplier & Exporter of API 5L X52 Spool

API 5L X52 Spool is a high‑strength line‑pipe spool assembly built from carbon steel that meets the API 5L specification. The “X52” grade indicates a minimum yield strength of ~52,200 psi (≈ 360 MPa), making it suitable for demanding pipeline applications that require both strength and reliability. Riddhi Siddhi Impex, a well-known steel fabricator in India, manufactures such spools with precision and quality control, establishing itself as a trusted API 5L X52 Spool domestic supplier..

At the Riddhi Siddhi Impex facility, spool assemblies are fabricated using both seamless and welded (ERW / SAW) API 5L X52 pipes. The company offers a wide range of spool configurations: straight runs, long spools, elbows, tees, reducers, and custom-fabricated spool assemblies. Each spool undergoes rigorous manufacturing steps—CNC cutting, automatic welding, and dimensional inspection—to ensure compliance with API 5L standards.

Quality assurance is central to Riddhi Siddhi Impex’s operations. After fabrication, each API 5L X52 Spool is subjected to hydrostatic pressure testing to verify integrity, followed by non-destructive examinations like ultrasonic (UT) or radiographic (RT) testing. This ensures that every spool delivered is free from critical defects and capable of withstanding the pressures typical of transmission pipelines..

In metropolitan and industrial hubs such as Mumbai, Delhi, and Bengaluru (Bangalore), Riddhi Siddhi Impex plays a critical role in supplying X52 spools for large-scale pipeline projects, city‑gas distribution networks, and cross-city fluid transport infrastructures. Their domestic manufacturing helps reduce lead times and logistics costs, making them a preferred domestic supplier in these regions...

In the southern and eastern industrial regions—Hyderabad, Chennai, and Kolkata—the demand for high-strength spool assemblies is strong, particularly in petrochemical plants, refineries, and gas processing units. Riddhi Siddhi Impex’s X52 spools are engineered to handle the workload of such industrial processes while complying with rigorous API 5L specifications, giving EPC contractors confidence in long-term performance..

API 5L X52 Spool - Specification & Details

Specification

Product Name	API 5L X52 Spool
Manufacturer	Riddhi Siddhi Impex
Base Material	Carbon Steel (API 5L X52)
Standard	API 5L / ASTM A106 / A53
Form	Seamless, ERW, LSAW
Pipe Ends	Plain End (PE), Beveled End (BE), Threaded
Size Range	1/2" NB to 48" NB
Wall Thickness	Sch 20 to Sch 160 / XXS
Applications	Oil & Gas Pipelines, Water Transmission, Chemical Transport, Infrastructure Projects

Chemical Composition (API 5L X52 Base Steel)

Element	Content (%)
Carbon (C)	0.26 Max
Manganese (Mn)	0.85 – 1.35
Phosphorus (P)	0.025 Max
Sulfur (S)	0.015 Max
Silicon (Si)	0.10 – 0.35
Nickel (Ni)	0.40 Max
Chromium (Cr)	0.30 Max
Molybdenum (Mo)	0.12 Max

Mechanical Properties

Property	Value
Tensile Strength	≥ 483 MPa
Yield Strength (0.2% offset)	≥ 359 MPa
Elongation	≥ 22%
Hardness	≤ 90 HRB
Impact Resistance	Good at ambient temperature

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
API	5L X52 / X52 PSL1 & PSL2
ASTM	A106 Grade B / A53 Grade B
EN	10216-2 P355NL1
DIN	St 52.3

Equivalent Standards

Standard	Description
API 5L	Specification for Line Pipe for Oil & Gas Pipelines
ASTM A106 / A53	Standard Specification for Carbon Steel Pipe for High Temperature and Pressure Service
EN 10216-2	Seamless Steel Tubes for Pressure Purposes

Other Types of Line Pipe Spools

Type	Description
API 5L X42	Lower strength line pipe spool for moderate pressure pipelines
API 5L X46	Medium strength line pipe spool with enhanced weldability
API 5L X60	High-strength line pipe for high-pressure pipelines
Seamless & Welded Spools	Custom-fabricated spools in seamless, ERW, or LSAW forms

In more remote and specialized regions—Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, and Madurai—Riddhi Siddhi Impex supports both large-scale and smaller process‑piping projects. Their expertise in delivering spool assemblies with exact isometric alignment and material certification helps clients meet stringent site requirements.

Frequently Asked Questions (FAQs)

Q1: What are the common applications of API 5L X52 Spools?

A1: They are widely used in oil & gas pipelines, water transmission, chemical transport, and infrastructure projects.

Q2: Can custom spool lengths and diameters be provided?

A2: Yes, Riddhi Siddhi Impex supplies custom lengths, diameters, and end connections based on project requirements.

Q3: Is API 5L X52 suitable for high-pressure pipelines?

A3: Yes, X52 spools provide high strength and pressure resistance, suitable for demanding oil, gas, and water pipelines.

Q4: Do the spools come with material certification?

A4: Yes, every spool comes with Material Test Certificates (MTC), NDT reports, and full traceability according to API standards.