NFPA 20 / UL 448 / FM 1311/1319

NFPA 20
NFPA 20 standard deals with the selection and installation of pumps supplying liquid for private fire protection.

  • The scope of NFPA 20 document include liquid supplies; suction, discharge, and auxiliary equipment; power supplies, including power supply arrangements; electric drive and control; diesel engine drive and control; steam turbine drive and control; and acceptance tests and operation.
  • The purpose of this standard is to provide a reasonable degree of protection for life and property from fire through installation requirements for stationary pumps for fire protection based upon sound engineering principles, test data, and field experience.
  • Standart Pompa, being a member of NFPA, follows all studies and publications related within the fire protection area.
  • Who UL is and What UL does:

  • UL (Underwriters Laboratories Inc.) is a global independent safety science company offering expertise across five key strategic businesses: Product Safety, Environment, Life & Health, University and Verification Services. Since the year UL founded in 1894, nearly 70,000 manufacturers in 100 countries have produced 20.000 different types of totally 20 billion UL Marked products.
  • UL engineers scientifically investigate and test thousands of types of products, materials, constructions and systems to evaluate the electrical, fire and injury risks; the burglary or fire resistance; or the ability to detect, control or limit fires.
  • UL has developed 1,200 Standards for Safety, which serve as the bedrock of compliance in over 200 industries.
  • There is an “Online Certifications Directory” in UL’s website and all the products listed by UL can be found here.
  • UL Safety Standard: UL 448

  • The requirements of this standard cover design and test features of centrifugal fire pumps intended for use in water-supply systems for fire-protection service.
  • The pumps covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Stationary Pumps for Fire Protection, NFPA 20.
  • Who FM is and What FM does:

  • FM (Factory Mutual) Global is one of the world’s largest business property insurers who also serves engineering solutions to be protected against basicly fire, natural disaster or other types of property risk.
  • FM Approvals is a unit of FM Global who certifies industrial and commercial products and services for companies. When a product or service meets the standards of FM Approvals, it is issued the “FM APPROVED” mark to signify it will perform as expected.
  • Currently there are about 45.000 certified products and services and these are listed in “FM Aprroval Guide” which can be found in FM website.
  • FM Approvals Standard: 1311 / 1319

  • FM Class 1311 states approval criteria for horizontal or vertical split case centrifugal fire pumps while FM Class 1319 states about horizontal end suction centrifugal fire pumps that supply water to fire protection systems.
  • The requirements in these standards are mainly based on ANSI Hydraulics Institute (HI) and NFPA 20 standards.
  • Design Features according to NFPA / UL / FM :

  • Only the specified capacities in the below table are allowed for rated capacity. For capacities higher than 5000 GPM, 500 GPM increments are allowed.
  • GPM m3/h GPM m3/h GPM m3/h
    25 5.68 400 90.8 2000 464
    50 11.3 450 102.2 2500 568
    100 22.7 500 113.5 3000 661
    150 34.0 750 170 3500 796
    200 45.4 1000 227 4000 909
    250 56.8 1250 284 4500 1022
    300 68.1 1500 341 5000 1136
  • All interior bolt or screw that are exposed to pumped liquid shall be of rolled bronze or corrosion resistant material.
  • The pump shall be provided with automatic air-release valve, circulation relief valve and pressure gauges.
  • Bearings shall have an L-10 rating of not less than 5000 hours at maximum load.
  • The pumps shall be provided with at least four packing rings plus a lantern ring. The lantern ring may be permitted to replace one ring of packing.
  • Impellers, wear rings, shafts, lantern rings, glands shall be made of corrosion resistant material.
  • Following material specifications are applied to STANDART NFPA / UL / FM fire pumps:
  • Part Definition DIN 17007 EN-DIN ASTM
    Casing Cast Iron 0.6025 GG 25 (GJL-250) A48 Gr. 40B
    Ductile Iron 0.7040 GGG 40 (GJS-400-15) A536 Gr. 60-40-18
    Impeller Cast Bronze 2.1050.01 G-CuSn 10 B584 C90700
    Shaft Stainless Steel 1.4021 X20 Cr13 A276 Type420
    Stainless Steel 1.4401 X5 Cr Ni Mo 17-12-2 A276 Type316
    Shaft Sleeve Stainless Steel 1.4401 X5 Cr Ni Mo 17-12-2 A276 Type316