Manufacturer, Supplier & Exporter of Alloy Steel Threaded Cap

An Alloy Steel Threaded Cap is a forged or machined pipe‑fitting component used to close off the end of a threaded piping run. Instead of being welded or socket‑welded, this fitting uses a threaded connection — making it ideal for systems where disassembly or frequent inspection may be required, or where welding is not feasible. Made from alloy steel grades, these caps are designed for higher strength, elevated temperatures, and more demanding services compared to simple carbon steel caps..

An Alloy Steel Threaded Cap is a vital forged pipe fitting used to close or block the end of threaded pipes in high-pressure systems. Unlike socket weld or butt weld caps, threaded caps provide a screw-on connection, making them ideal for systems that require occasional maintenance or disassembly. Known for their strength, durability, and corrosion resistance, these caps are extensively used in industries like oil and gas, power generation, petrochemicals, and shipbuilding...

Made from high-grade alloy steels such as ASTM A182 F5, F9, F11, F22, and F91, these threaded caps can withstand high pressure, temperature, and corrosive environments. The alloy content—typically including chromium, molybdenum, and sometimes vanadium—enhances their mechanical properties and service life. These fittings comply with international standards such as ASME B16.11, ensuring high performance and dimensional accuracy..

Riddhi Siddhi Impex is a renowned name in the manufacturing and supply of pipe fittings, including Alloy Steel Threaded Caps. With state-of-the-art facilities and strict quality control, the company ensures each product meets stringent industry requirements. Their range of forged fittings is engineered for performance, and they cater to various industries both domestically and globally. Riddhi Siddhi Impex stands out for its commitment to timely delivery, technical support, and customer satisfaction...

As a prominent Alloy Steel Threaded Cap Domestic Supplier, Riddhi Siddhi Impex serves a wide array of Indian cities. These include metropolitan and industrial hubs such as Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and Rajkot. The company’s efficient logistics and warehousing system ensure quick delivery, minimal downtime, and excellent customer service to clients across India..

Alloy Steel Threaded Cap - Specifications

Specification	Details
Product	Alloy Steel Threaded Cap
Material Grades	ASTM A182 F5, F9, F11, F22, F91
Manufacturing Standard	ASME B16.11 / MSS SP-79
Connection Type	Threaded (NPT / BSPT)
Pressure Class	Class 2000 / 3000 / 6000
Sizes	1/8” to 4” (DN6 to DN100)
Applications	Oil & Gas, Power Plants, Petrochemical, Marine, Water Treatment

Chemical Composition (ASTM A182 F22 - Typical)

Element	Content (%)
Carbon (C)	0.05 – 0.15
Chromium (Cr)	1.90 – 2.60
Molybdenum (Mo)	0.87 – 1.13
Manganese (Mn)	0.30 – 0.60
Silicon (Si)	Max 0.50
Phosphorus (P)	Max 0.030
Sulfur (S)	Max 0.030

Mechanical Properties (ASTM A182 F22)

Property	Value
Tensile Strength	≥ 415 MPa
Yield Strength (0.2% Offset)	≥ 205 MPa
Elongation	≥ 20%
Hardness (Brinell)	≤ 197 HB

Threaded Cap Dimensions (ASME B16.11)

Nominal Pipe Size (inches)	Outside Diameter (D)	End-to-Top (H)	Minimum Wall Thickness
1/2"	21.3 mm	28 mm	3.5 mm
3/4"	26.7 mm	33 mm	3.9 mm
1"	33.4 mm	38 mm	4.2 mm
1-1/2"	48.3 mm	45 mm	5.0 mm
2"	60.3 mm	48 mm	6.2 mm

Equivalent Grades

Standard	Equivalent Grade
ASTM	A182 F5, F9, F11, F22, F91
DIN	13CrMo4-5, 10CrMo9-10
EN	1.7335, 1.7380
JIS	SCM435, SCM440

Equivalent Standards

Standard Body	Specification
ASME	B16.11
ASTM	A182
EN	10222-2
DIN	2605 / 2615

Other Types of Threaded Forged Fittings

Fitting Type	Description
Threaded Elbow	Used to change direction (90° or 45°)
Threaded Tee	Joins three pipes at 90-degree angles
Threaded Coupling	Connects two pipes inline
Threaded Cross	Connects four pipes in a cross layout
Threaded Union	Allows easy disconnection for maintenance

Riddhi Siddhi Impex’s distribution network also extends to emerging industrial cities like Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, and Chandigarh. These regions are experiencing rapid growth in infrastructure, manufacturing, and energy sectors, where high-performance pipe fittings like Alloy Steel Threaded Caps are in constant demand. The company plays a crucial role in supporting these developments with high-quality products and technical support..

Frequently Asked Questions (FAQs)

Q1: What is an Alloy Steel Threaded Cap used for?

A1: It is used to seal or close the end of a threaded pipe in systems requiring removable closures.

Q2: What pressure ratings are available for threaded caps?

A2: Available in Class 2000, 3000, and 6000 pressure ratings.

Q3: Which thread standards are supported?

A3: Caps can be supplied with NPT (National Pipe Thread) or BSP (British Standard Pipe) threads.

Q4: Do you supply Alloy Steel Threaded Caps across India?

A4: Yes, Riddhi Siddhi Impex supplies to all major Indian cities including Mumbai, Delhi, Pune, Chennai, Hyderabad, Kolkata, Ahmedabad, and more.