China manufacturer of Hex Plug shoulder plug for Heat Exchanger.

What is Hex Plug?

Hex plug is a forged pipe fittings with a Hexagonal Head and thread body.It is used in piping systems to close or seal the end of a pipe or fittings.

  • Material:
    • Hex plugs are commonly made from forged materials like
    • carbon steel, ASTM A105,ASTM A105N,ASTM LF2,
    • stainless steel,ASTM A182 F304/304L,ASTM A182 F316/316L,
    • Duplex stainless steel ,ASTM A182 F51,ASTM A182 F53,A182 F55
    • alloy steel
  • Manufacturing Process:
    • The forging process involves shaping metal under high pressure to produce strong and durable fittings. This ensures that hex plugs have high strength and resistance to pressure and temperature.
  • Thread Type:
    • Hex plugs usually have male threads (such as NPT, BSPT, or UNF) to match the female threads of a pipe or fitting.
  • Standards:
    • Manufactured according to various standards, such as:
      • ASME B16.11 for forged fittings.
      • ISO or other national/international standards, depending on the industry.

ANSI/ASME B16.11 Hex Head Plug Dimension

Hex Head Plug

Hex Plug
NPS Min Length
E		 Min Hex Height
J		 Nominal
F
1/2 14 8 22
3/4 16 10 27
1 19 10 35
1.1/4 21 14 44.5
1.1/2 21 16 51
2 22 18 63.5
2.1/2 27 19 76
3 28 21 89
4 32 25 117.5

Hex Head shoulder Plug Dimension

Hex Head Shoulder Plugs for Heat Exchangers

Shoulder plug or header plug are made for plugs type header boxes in air cooled heat exchangers or fin fan air coolers. A shoulder plugs and gasket are located opposite each tube which allows access for inspection and cleaning of individual tubes. Spare plugs and gaskets may be needed to replace originals during routine maintenance or used to plug leaking tubes.

Shoulder plugs are made from different material grades, such as carbon steel SA 105 and SA 350LF2 or stainless steel AISI 304L, AISI 316L, AISI 321 and also from Duplex stainless F51, F53, F55 as well as Nickel alloys Inconel 625, Inconel 825 and Inconel 925.

Plug Std Length Length Hex
Size
Inch		 Hex
Size
MM
Dia UNF Under
Head
Inch		 Under
Head
MM
3/4 16 5/8 15.90 1 25.40
3/4 19.05
7/8 22.23
1 25.40
1.1/4 30.75
7/8 14 7/8 22.23 1.1/8 28.58
1 25.40
1.1/8 12 3/4 19.05 1.3/8 34.93
7/8 22.23
1 25.40
1.1/8 28.58
1.1/4 30.75
1.3/8 34.93
1.1/2 38.10
1.5/8 41.28
1.3/4 44.45
2 50.80
1.3/8 12 3/4 19.05 1.5/8 41.28
7/8 22.23
1 25.40
1.1/8 28.58
1.5/8 12 7/8 22.23 1.7/8 47.63
1 25.40

Hex plugs are integral forged pipe fittings designed to provide a reliable and durable solution for sealing the ends of pipes or fittings for heat exchanger.