Oil & Gas Sector
Oil & Gas Sector

Oil refineries are typically large, sprawling industrial complexes with extensive piping running throughout, carrying streams of fluids between large chemical processing units, such as distillation columns.

High temperature pipelines or cross country pipelines which are transporting fuel and crude oil often use alloy steel grade B-7, B-7M grade stud bolts for flange joints.

Stud bolts are available in multiple diameters and lengths combinations, metric and imperial, and in a variety of materials from carbon steel to alloy, stainless and nickel alloys (common grades are: ASTM A193 B7, L7, B8, B8M, B16, Alloy 20, Monel, Hastelloy, Inconel, 17-4PH, titanium, etc.).

The material of the hex steel nuts shall match the material of the threaded rod (generally, stud materials ASTM A193 match with nuts materials ASTM A194).

The ASME B16.5 specification covers stud bolts and nuts for ASME flanges

 

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Heavy Hex Structural Bolt

Heavy hex structural bolts are designed for steel-to-steel connections and include ASTM A325 and A490 specifications, which covers bolts from 1/2” up to 1-1/2” in diameter. Since these heavy hex bolts are intended for structural connections, they have shorter thread lengths than standard hex bolts.

Heavy Hex Bolts are designed for use in a variety of high temperature, high strength industrial applications, such as with steel fabrication and general construction. They feature a thicker head than standard or regular hex bolts, and offer a greater bearing surface that distributes the clamping load over a wider area.

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Size Range
Diameter

Metric : M12 to M42
Inch: 5/16" to 2"

Length

Metric : 20 mm to 300 mm
Inch: 7/8" to 12"

Hex Head Bolt

As the name implies, these bolts feature a hexagonal head or a hex head, that is suitable for tightening with a wrench or socket. A hex bolt may be fully threaded or may feature an unthreaded shoulder. Hex bolts are often used to fasten wood to wood, metal to wood, or metal to metal

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Size Range
Diameter

Inch : 5/16"to 2"
Metric : M8 to M42

Length

Metric: 20 mm to 300 mm
Inch : 7/8" to 12"

Hex Head Screw

Hex Cap Screws are fasteners featuring a hexagonal, six-sided, head with a washer face on the bearing surface and a chamfered point. Commonly used in construction and machine assemblies, hex cap screws are one of the most common fasteners used on the jobsite today.

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Size Range
Diameter

Metric: M8 to M42
Inch: 5/16 “to 2"

Length

Metric: 20 mm to 300 mm
Inch: 7/8" to 12

Shank Studs

ASTM A193 Grade B7 Studs /Shank studs coupled with a pair of nuts are most commonly used fasteners for bolting carbon steel pipelines.P.I is a manufacturer and supplier of A193 Grade B7 Stud Bolts with full threads, double end threads and tap end thread configuration. We offer B7 stud bolts in both metric and imperial sizes with coarse, fine & extra fine threads. These stud bolts are produced with full compliance to all requirements of ASTM A193 Grade B7 specification and supplied with authentic 3.1 certificate.

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Size Range
Diameter

1/2" to 2-1/2"

Length

25 mm to 500 mm

Heavy Hex Nut

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Size Range
Diameter

Metric: M12 to M42
Inch: 1/2" to 1-7/8"

Length

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Hex Nut

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Size Range
Diameter

Metric: M8 to M80
Inch: 5/16" to 3"

Length

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Hardened Steel Washer

Hardened washers are made physically stronger through hardening or carburizing, but are generally smaller in size than your standard washer. Hardened flat washers are designed with extra strength and can be used with Grade 8 bolts and other heat-treated fasteners.

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Size Range
Diameter

Metric: M12 to M42
Inch: 1/2" to 2"

Length

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Plain Washer

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View Details
Size Range
Diameter

Metric: M8 to M42
Inch: 5/16" to 2"

Length

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