Manufacturer, Supplier & Exporter of ASTM A335 P92 Spool

ASTM A335 P92 is a very high-performance chromium-molybdenum alloy steel (Cr–Mo–W–V–Nb) specifically engineered for ultra-supercritical (USC) power plant applications. The P92 grade provides superior creep strength, high-temperature stability, and oxidation resistance, making it ideal for spool (pre-fabricated pipe) sections used in superheaters, reheaters, headers, and other high-stress, high-temperature power-plant lines. Compared to earlier Cr–Mo steels (like P22) or even P91, P92 offers higher allowable stress at elevated temperatures, which helps in reducing wall thickness or extending service life...

While there is limited public information explicitly listing “P92 spools” on the Riddhi Siddhi Impex website, given their experience in alloy-steel pipe supply and strong presence in Cr–Mo grades, they are well positioned to source or fabricate P92 spool segments. Their network with mills, coupled with their stockist capacity, means they could potentially offer seamless or welded P92 pipes and prefabricated spools for critical power-plant projects. They would likely ensure proper mill-testing certification (MTC), heat treatment, and end preparation to meet project-specific spooling needs..

In India, the demand for P92 spools is particularly strong in cities and regions with large, modern thermal power plants, such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, and Vadodara. As the country also expands ultra-supercritical power capacity, P92 becomes a very attractive choice. Further, in the power-plant rich regions of Madhya Pradesh (Indore, Bhopal), Rajasthan (Jaipur, Udaipur), Uttar Pradesh (Kanpur, Lucknow, Agra), and along coastal industrial zones like Visakhapatnam, Kochi, Mangalore, the need for P92 spools is likely to grow due to its high-temperature capabilities..

In India, P92 spools would find ideal application in ultra-supercritical (USC) power plants, especially in superheaters, reheaters, and headers where steam conditions are very demanding. In cities like Nagpur, Bhopal, Kanpur, Agra, and Varanasi, where newer or upgraded thermal plants may adopt P92, these spools can provide longevity and efficiency gains. Beyond power, P92 is also relevant for petrochemical plants, high-pressure heat exchangers, and process piping in industrial hubs such as Ahmedabad, Surat, and Chennai...

Despite its advantages, P92 is more expensive because of its heavy alloying (especially tungsten and niobium), and quality control is critical: every batch must come with mill test certificates and possibly third-party inspection for creep, microstructure, and heat treatment. Logistics for P92 spools are challenging, as these are heavy, high-value segments. A supplier like Riddhi Siddhi Impex would need to carefully manage inventory, maintain strict QA processes, and coordinate with major industrial cities across India (like Delhi, Mumbai, Hyderabad, Mysuru, and Kochi) to ensure timely delivery and reliable supply..

ASTM A335 P92 Spool

Specification

Product Name	ASTM A335 P92 Spool
Manufacturer	Riddhi Siddhi Impex
Base Material	Alloy Steel
Standard	ASTM A335 / ASME SA335
Grade	P92
Temperature Range	Up to 620°C
Form	Seamless, Welded
Applications	Power plants, Boilers, Superheaters, Reheaters, Petrochemical industries

Chemical Composition

Element	Content (%)
Carbon (C)	0.08 – 0.12
Manganese (Mn)	0.30 – 0.60
Phosphorus (P)	0.020 Max
Sulfur (S)	0.010 Max
Silicon (Si)	0.20 – 0.50
Chromium (Cr)	8.00 – 9.50
Molybdenum (Mo)	0.85 – 1.05
Vanadium (V)	0.18 – 0.25
Niobium (Nb)	0.06 – 0.12
Cobalt (Co)	0.10 Max
Nitrogen (N)	0.03 Max
Tungsten (W)	0.20 – 0.30

Mechanical Properties

Property	Value
Tensile Strength	≥ 585 MPa
Yield Strength (0.2% offset)	≥ 415 MPa
Elongation	≥ 20%
Impact Toughness	≥ 47 J at room temperature
Hardness	≤ 240 HB

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	A335 P92
EN	1.4903 / X20CrMoV12-1
DIN	14CrMoV63
BS	150-1 P92

Equivalent Standards

Standard	Description
ASTM A335	Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
ASME SA335	Code for Pressure Piping, Alloy Steel
EN 10216-2	Seamless Steel Tubes for Pressure Purposes

Other Types

Type	Description
ASTM A335 P11	Low alloy steel for moderate high-temperature applications
ASTM A335 P22	Chromium-molybdenum steel for high temperature pressure service
ASTM A335 P91	High creep-strength steel for power and boiler applications
ASTM A335 P23 / P12	Alloy steel for high temperature steam and piping service

Riddhi Siddhi Impex, as a reputed supplier of alloy steel, leverages a strong pan-India distribution network. They can serve industrial hubs such as Mumbai, Pune, and Nashik in Maharashtra, Delhi and Agra in Uttar Pradesh, Bengaluru, Mysuru, and Mangalore in Karnataka, Hyderabad in Telangana, and Chennai and Coimbatore in Tamil Nadu. Additionally, Gujarat’s industrial corridors (Ahmedabad, Surat, Vadodara, Ankleshwar, Dahej, Navsari, Valsad) are key areas where high-temperature spools like P92 are in demand for power and petrochemical projects..

Frequently Asked Questions (FAQs)

Q1: What are the primary applications of ASTM A335 P92 Spool?

A1: It is used in power plants, superheaters, reheaters, and high-pressure piping systems where high creep strength and temperature resistance are required.

Q2: Can P92 spools be supplied in customized lengths and diameters?

A2: Yes, Riddhi Siddhi Impex offers customized dimensions based on project requirements, including seamless and welded configurations.

Q3: What certifications are provided with P92 spools?

A3: Spools come with mill test certificates (MTC), chemical analysis reports, and mechanical property certification as per ASTM/ASME standards.

Q4: Which Indian cities can be supplied with P92 spools?

A4: Riddhi Siddhi Impex supplies across domestic industrial hubs including Mumbai, Delhi, Bengaluru, Chennai, Hyderabad, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Nagpur, Jaipur, and many more.