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4. ASME B16.11 Forged steel fittings

Threaded Hex Head Plug

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Description

Threaded Hex Head Plug is a type of pipe fitting designed to seal the open ends of pipes or valves. This product has a hexagonal shape for easy use of a wrench or hex key when installing and removing.

Applications

Threaded Hex Head Plug is widely used in many different industries:

  • Oil and Gas Industry: Used in oil and gas pipeline systems.
  • Chemical industry: Used to seal pipes in chemical production and transportation systems.
  • Water supply and drainage industry: Applications in water supply and wastewater treatment systems.
  • Food and pharmaceutical industry: Used in systems requiring high hygiene such as food and pharmaceutical production.

Standards

ASME B16.11 is one of the most important standards for pipe fittings, including the THREADED HEX HEAD PLUG. This standard specifies the requirements for dimensions, materials, wall thickness, and pressure resistance of threaded fittings.

  • Size: From 1/8” to 4” (NPS – Nominal Pipe Size)
  • Material: Carbon steel, stainless steel, alloy steel
  • Pressure: Depends on product size and material.
  • For example:
    • Class 2000: Fittings can withstand a maximum pressure of 2000 psi (approximately 137.9 bar)
    • Class 3000: Fittings can withstand a maximum pressure of 3000 psi (approximately 206.8 bar)
    • Class 6000: Fittings can withstand a maximum pressure of 6000 psi (approximately 413.7 bar)

Threaded Hex Head Plug Dimensions and Thickness Table according to ASME B16.11

Size (NPS)

Diameter D (inch)

Thickness t (inch)

Length A (inches)

1/2

0.84

0.109

0.69

3/4

1.05

0.113

0.81

1

1.32

0.133

0.98

1 1/4

1.66

0.140

1.00

1 1/2

1.90

0.145

1.03

2

2.38

0.154

1.06

2 1/2

2.88

0.203

1.31

3

3.50

0.216

1.44

4

4.50

0.237

1.69

5

5.56

0.258

1.94

6

6.62

0.280

2.19

8

8.62

0.322

2.56

10

10.75

0.365

2.94

12

12.75

0.406

3.31

14

14.00

0.438

3.69

16

16.00

0.500

4.06

18

18.00

0.562

4.44

20

20.00

0.593

4.81

24

24.00

0.687

5.56

Note:

  • Size (NPS) : Nominal size of pipe, expressed in inches.
  • Diameter D (inch) : Outside diameter of the end cap.
  • Thickness t (inch) : Thickness of the end cap wall.
  • Length A (inches) : Overall length of the end cap, from the outside face of the end cap to the end of the thread.

Material Summary Table of Threaded Hex Head Plug

Material Type ASTM Standards Characteristic Application
Carbon steel ASTM A105 High durability, reasonable price Oil and gas, general industry
Stainless Steel ASTM A182 (F304, F316) Good corrosion resistance Food, chemicals, pharmaceuticals
Alloy steel ASTM A182 (F11, F22) High durability, good heat resistance Energy and thermal power industry
Copper ASTM B62 Good conductor of heat and electricity Plumbing, HVAC
Galvanized steel ASTM A105 + galvanized Rust-proof, durable Outdoor, humid environment
Inconel ASTM B564 (Alloy 600) High heat and corrosion resistance Petrochemicals, nuclear energy
Hastelloy ASTM B564 (C276) Excellent corrosion resistance Chemical and pharmaceutical industry
Monel ASTM B564 (400, K500) Corrosion resistant, high durability Marine and chemical industry

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