Manufacturer, Supplier & Exporter of Alloy Steel Hex Head Plug

An Alloy Steel Hex Head Plug (sometimes called a “hex plug” or “hexagonal head pipe plug”) is a threaded fitting used to close off or seal the end of a pipe or fitting. The hexagonal head allows a wrench or spanner to grip and apply torque for tightening or loosening. When made of alloy steel, such plugs offer greater strength, temperature & pressure resistance, and wear / corrosion performance compared to ordinary carbon steel plugs. They are commonly used in piping systems in refineries, power plants, chemical plants, and various industrial systems to plug unused ports or ends, or for blind closures during testing..

Alloy Steel Hex Head Plugs are typically made from alloy steel grades such as ASTM A182 F5, F9, F11, F22, F91, or equivalent alloy compositions, depending on the intended service temperature, pressure, and corrosion conditions. The alloying elements (e.g. chromium, molybdenum, vanadium) enhance creep resistance, tensile strength, and durability under cyclic loading. The hexagonal head design also provides mechanical advantage during installation. For more demanding services (e.g. high temperature steam lines, sour service, or aggressive chemical environments), alloy plugs are preferred over plain carbon steel plugs..

Riddhi Siddhi Impex offers extensive customization options for Alloy Steel Hex Head Plugs to meet diverse client requirements. This includes variations in material grades, thread standards such as NPT or BSP, sizes, and surface finishes or coatings for enhanced corrosion resistance. The company places a strong emphasis on quality assurance, providing detailed material test certificates, precise machining tolerances, and, if required, third-party inspections to ensure compliance with industry standards. Being a domestic supplier, Riddhi Siddhi Impex can respond quickly to customer inquiries, provide timely replacements, and offer comprehensive after-sales support, which significantly benefits Indian industries by reducing downtime and ensuring seamless project execution..

Riddhi Siddhi Impex has established itself as a trusted manufacturer and domestic supplier of Alloy Steel Hex Head Plugs across India. Their strong presence in key industrial hubs and tier-2 cities, combined with efficient logistics and high-quality manufacturing, positions them uniquely to serve India’s growing infrastructure and industrial needs. Whether catering to power plants in Chennai, refineries in Gujarat, or chemical industries in northern India, Riddhi Siddhi Impex ensures clients receive reliable, specification-compliant products with prompt delivery and local support. This makes them a preferred choice for businesses looking for alloy steel pipe fittings in India’s competitive market...

Beyond just manufacturing and supplying Alloy Steel Hex Head Plugs, Riddhi Siddhi Impex prioritizes customer satisfaction by offering expert technical support throughout the procurement and installation process. Their team of engineers and sales professionals assists clients in selecting the right material grades, thread types, and sizes based on application specifics such as pressure, temperature, and fluid compatibility. This consultative approach helps reduce errors and enhances system reliability. Moreover, they facilitate documentation support including certification, inspection reports, and traceability, making it easier for customers to meet regulatory and project compliance..

Alloy Steel Hex Head Plug - Specifications

Specification	Details
Product	Alloy Steel Hex Head Plug
Material Grades	ASTM A182 F5, F9, F11, F22, F91
Manufacturing Standard	ASME B16.11 / ASTM A182
Connection Type	Threaded (NPT / BSP)
Pressure Class	Class 2000 / 3000 / 6000
Sizes	1/8” to 4” (DN6 to DN100)
Application	Oil & Gas, Power Plants, Petrochemical, Chemical, Marine Industries

Chemical Composition (Typical for ASTM A182 F22)

Element	Percentage (%)
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

Dimension Chart (Hex Head Plug) - ASME B16.11

Nominal Pipe Size (inch)	Outside Diameter (mm)	Hex Head Width Across Flats (mm)	Thread Length (mm)
1/8"	10.3	17	11
1/4"	13.7	22	12
3/8"	17.2	27	14
1/2"	21.3	33	16
3/4"	26.7	41	18
1"	33.4	50	20
1-1/4"	42.2	60	22
1-1/2"	48.3	70	24
2"	60.3	85	26

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
Hex Head Plug	Used to close pipe ends with hexagonal head for easy wrenching
Threaded Elbow	Used to change pipe direction (usually 45° or 90°)
Threaded Tee	Joins three pipes in a T shape
Threaded Coupling	Connects two pipes inline
Threaded Union	Allows easy disconnection of pipes

With India’s infrastructure and industrial sectors expanding rapidly, demand for high-quality alloy steel fittings like hex head plugs is expected to grow significantly. Riddhi Siddhi Impex continuously invests in advanced forging, machining, and testing technologies to improve product durability, dimensional accuracy, and production efficiency. Their forward-looking strategy includes expanding their domestic distribution network to tier-3 cities and industrial corridors, reducing lead times further, and exploring export opportunities. By staying aligned with evolving industry standards and customer expectations, Riddhi Siddhi Impex is well-positioned to maintain leadership as a reliable domestic supplier of alloy steel fittings in India’s dynamic market..

Frequently Asked Questions (FAQs)

Q1: What is an Alloy Steel Hex Head Plug used for?

A1: It is primarily used to seal the end of a threaded pipe or fitting, allowing easy removal via its hexagonal head.

Q2: What thread standards are available?

A2: Available thread types include NPT (National Pipe Thread) and BSP (British Standard Pipe) as per client requirements.

Q3: What pressure classes do these plugs support?

A3: Alloy Steel Hex Head Plugs are available in pressure classes such as 2000, 3000, and 6000, meeting ASME B16.11 requirements.

Q4: Do you supply Alloy Steel Hex Head Plugs across India?

A4: Yes, Riddhi Siddhi Impex supplies Alloy Steel Hex Head Plugs to major industrial cities including Mumbai, Delhi, Bengaluru, Chennai, Ahmedabad, Surat, Pune, and many more.