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About TSP®
TSP® has been manufacturing premium malleable iron pipe fittings since 1983, establishing itself as a globally recognised leadiner in the industry. With production exceeding 10,000 tonnes annually. TSP® supplies critical infrastructure projects across more than 20 countries worldwide.

Quality Standards & Certifications
Certified to EN10242, FM Approved and manufactured to ISO 49. TSP® malleable cast iron fittings are manufactured to the highest international standards:

  • ISO 49 and EN10242 compliant for dimensional accuracy and performance
  • FM Approved for fire protection and sprinkler systems
  • Lead-free composition meeting potable water safety requirements
  • Hot-dip galvanised coating minimum 70µ per 500gr/m² for corrosion resistance
  • Design symbol A designation for air, water, oil, gas and steam installations

Technical Specifications

Mechanical Properties

  • Tensile strength: 350N/mm²
  • Elongation: 10% minimum
  • Hardness: 150HB maximum
Working Pressure Ratings
  • 1/8" to 4": 100 bar hydrostatic test pressure
  • 5" and 6": 64 bar hydrostatic test pressure
  • Maximum working pressure: 25 bar (-20ºC to 120ºC)
Available Finishes
  • Black malleable iron
  • Hot-dip galvanised with zinc coating

Global Projects & Applications

TSP® fittings have been specified for major infrastructure projects worldwide including Singapore's "Garden in the Sky" and Jaguar Land Rover, among many others, as well as iconic structures in highly regulated markets like Japan. The fittings are trusted across diverse applications:

  • Sanitary, heating and gas installations
  • Cooling and air conditioning systems
  • Fire sprinkler and gas extinguishing systems
  • Industrial plant construction
  • Paper production machinery
  • Commercial vehicle manufacturing
Comprehensive Product Range

TSP® manufactures a complete range of malleable iron fittings from 1/8" to 6" in BSP taper/parallel threads:
  • Elbows: 45º and 90º in equal and reducing configurations
  • Tees: Equal, reducing and three-way configurations
  • Unions: Standard, spherical seat and taper seat options
  • Sockets and nipples: Including reducing variants
  • Plugs and caps: Square head and beaded options
  • Specialised fittings: crosses, backnuts and custom configurations
Why Choose TSP® Fittings
  • Proven Durability: Over 40 years of manufacturing expertise with rigorous quality control processes ensuring consistent performance in demanding applications
  • Global recognition: Exported to 20+ countries with UK and EU accreditations, meeting the world's most stringent construction industry standards
  • Technical Excellence: Manufactured using high-quaity iron with superior mechanical strength, designed for safe operation in water, gas, steam and oil systems.
  • Comprehensive Support: Complete dimensional specifications and technical documentation available for all fittings, ensuring proper selection and installation.

Browse our complete range of?TSP® malleable iron fittings?or contact our technical team?for specification assistance.