Carbon Steel Countersunk Plug with Viton Seal, Parallel Thread， Zinc Plated, Cold Heading

The common specifications and models of zinc plated threaded plugs are as follows:

1.Nominal diameter specification ‌ :

DN15(4 points), DN20(6 points), DN25(1 inch), DN32(1 inch ⊃2;), DN40(1.5 inches), DN50(2 inches), DN65(2.5 inches), DN80(3 inches), DN100(4 inches), etc

Special specifications such as DN10-DN114 are suitable for high-voltage scenarios.

‌

2.Thread type ‌ :

 British pipe threads ‌ : G1/8, G1/4, G3/8, G1/2, G3/4, G1", etc., meet 55° Wyeth non-seal standard

American pipe thread ‌ : NPT series (60° sealing thread), such as 1/4-4 inches

Metric thread ‌ : M5×0.8 to M30×1.5, etc

‌

3. Structural form ‌ :

Hex socket plug (ED sealed type)

Hexagonal external plug (high-pressure forged type)

Four-sided plugs

Edgeless/edged plug (ductile iron material)

‌

4. Material and treatment ‌ :

Galvanized carbon steel (commonly found in ordinary pipelines)

Galvanized cast iron (corrosion-resistant, used for plumbing and fire protection)

A105 Forged steel (for high-pressure petrochemical use)

‌

5. Pressure rating ‌ :

Conventional pressure: SCH80, 3000LB, 6000LB, etc

Fire-fighting/hydraulic explosion-proof type

Sample model marking:

"DN20 galvanized ductile Iron borderless Plug "1

"G1/2 Imperial Hex Socket ED Sealed Galvanized Plug "24

"NPT 1-inch A105 High-voltage Hexagonal plug"

Note: When making a purchase, it is necessary to confirm that the thread standard matches the pipeline. For sealing requirements, choose a design with ED gasket or conical thread.

All of our carbon steel cold heading threaded plugs are made according to customer's drawings or samples. They could be standard size or non-standard size. The below chart is to show how we serve to our customers:

Product Advantages of Carbon Steel Threaded Plug with Viton Seal:

• Military-grade protection system

  Triple Protective Shield

  Galvanized Armor : The military-grade zinc coating (5-15μm) forms an anodic barrier. The salt spray test exceeds 500 hours (ASTM B117), completely ending rust

   Fluororubber Core shield  : Viton® sealing rings resist aviation fuel, strong acids, and hydraulic oil (under extreme working conditions ranging from -26℃ to 205℃)

  Carbon steel matrix  : The tensile strength of cold-rolled SAE 1008 steel is > 420MPa, which increases the service life by 300% compared with ordinary steel parts

  
  

• Disruptive Advantages of cold heading process

  Atomic-level structure strengthening

  The grain flow direction is the same as that of the thread (non-cutting processing), and the fatigue strength is ↑45%

  Surface hardness HV280↑, completely prevent chipping during installation (the damage rate of traditional turned parts is > 12%)

  Material utilization rate 98% (turned parts only 60%), saving 42 tons of material per million pieces ✅

  
  

• The Ultimate Solution for zero leakage

  Physical sealing matrix.

  ① Metal hard seal: Parallel thread full tooth surface meshing (ISO 228-1 standard)

  ② Elastic dynamic sealing: Viton® with a compression rate of 23% automatically compensates for thermal expansion and contraction

  ③ Geometric sealing: 82° precise pressing on the countersunk conical surface (sealing force ↑70%)

• Full Life Cycle Cost Revolution

  Installation efficiency  : The automatic tightening torque only requires 22N·m (40% less effort than conical threads)

  Maintenance Cost  : No replacement for 10 years (Actual application data of offshore platforms)

  Failure cost : Leakage accident rate < 0.001% (Insurance cost ↓35%)

Packaging:

FAQ:

1Q: In what aspects is the cold heading process superior to turning?

1A: The metal fibers remain intact without being cut, with a strength of ↑45%. There is no chipping during installation, and the service life is extended by six times

2Q: What media are Viton® sealing rings resistant to?

2A: Resistant to strong acids, oils, and extreme environments ranging from -54℃ to 205℃, with a permanent compression set of less than 18%

3Q: How effective is galvanizing in preventing rust?

3A: Salt spray protection > 500 hours, 8-year warranty for Marine environment (adhesion Class 0)

4Q: Is the parallel thread seal reliable?

4A: Triple sealing (metal + elastomer + conical surface locking), zero leakage at 20MPa pressure

5Q: How much cost can actually be saved?

5A: The defect rate is less than 0.2%, materials are saved by 94%, and the overall cost is reduced by 40%