NSF ANSI 2-2019 pdf free download – NSF International Standard lAmerican National Standard for Food Equipment 一Food Equipment.
5.2.2 For metals, solder or other fillet material shall not be used to effect the required minimum radius ofan internall angle or corner.
5.2.3 For materials other than metal, the radi specified in Sections 5.2.1.1 and 5.2.1.2 shall be effectedusing parent material or a material proven to be bonded and otherwise equal to or better than the parentmaterial.
5.3 External angles and corners
Exposed external angles and corners in a food zone shall be sealed and smooth (see Figure 1a).5.4Jolnts and seams
5.4.1 Permanent joints and seams in a food or splash zone shall be sealed and smooth.
5.4.2Permanent joints and seams in a nonfood zone shall be closed. Welded joints and seams in anonfood zone shall be deburred.
5.4.3__Joints formed by overlapping sheets of material shall not create upwardly facing horizontal ledges(see Figure 1b).
5.4.4 Sealants shall only be used to seal joints and seams that are structurally sound and are less than’%e in(0.13 in, 3.2 mm) wide before sealing. Sealants may be used to fill spaces around collars, grommets,and service connections.
5.4.5Solder and other fillet material shall be secutely bonded to its substrate.All flux and catalyticmaterials shall be removed.
5.4.6 Equipment shall be designed and manufactured so that field joints may be made sanitary with theuse of trim strips，welding,soldering,properly designed draw fastening,or other appropriate methods(see Figure 20.
5.5 Fasteners
5.5.1 Fasteners shall not be used in a food zone.
5.5.2 Fasteners shall be easily cleanable.Fasteners meeting this requirement include, but are not limitedto, slot-head and Phillips-head screws, hex-head fasteners,and flush-break pop rivets. Hex-key screwsand nonflush-break pop rivets may be used in a splash zone or a nonfood zone provided that the headsare capped or filled.
5.5.3 Fasteners shall be tight fitting to the surface except as permitted in Section 5.5.4.
5.5.4 No more than one locking washer and one flat washer shall be used per fastener head. Thediameter of the washer adjacent to the fastening surfae shall not be less than the diameter of the washerunder the fastener head.External-tooth lock washers shall not be used.
5.5.5 There shall be no exposed threads, projecting screws, or studs in a food or splash zone. Thereshall be no more than 2.5 exposed threads or 1/4 in (0.25 in,6.4 mm) of exposed threads, whichever is less,in a nonfood zone.Exposed threads on electrical cord sirain relief devices in nonfood zone shall be exempt.5.5.6 The sharp point of a fastener shall not be exposed.
5.6lnsulation
Insulated spaces in the food and splash zones shall be sealed. Insulated spaces in the nonfood zone shallbe closed.
5.7Reinforcing and framing
5.7.1 Exposed reinforcing and framing members and gussets shall be easily cleanable.Reinforcing andframing members shall be designed and manufactured to prevent the harborage of vermin (see Figure 3).5.7.2 Horizontal surfaces of reinforcing and framing members and gussets shall not be located wheredebris may accumulate.
5.7.3 Vertical channels that form hollow sections shall be closed at each end, open at each end, or readilyaccessible along the entire channel.All other hollow sections shall be closed at each end.
5.8Inspection and maintenance panels
When necessary for equipment inspection and maintenance, removable panels of adequate size shall beprovided.Each panel shall be sized to permit removal and replacement by one person.
5.9Doors
5.9.1 Doors shall be sized to fit their openings and shall close properly.5.9.2Slidling doors shall slide freely and shall be readily removable.
5.9.3 Exposed channel sections on single panel doors shall be inverted or easily cleanable. Clean-outsshall be provided if channels are not imverted (see Figure 4).
5.9.4 Exposed edges of glass doors shall be protected by tight fitting channels,stripping materials,orother means such as rounding the edges of tempered glass to protect against chipping. The glass shallconform to the requirements of Section 5.44.3(see Figure 5).
5.9.5 Door gaskets
5.9.5.1 Exposed surfaces of door gaskets shall be easily cleanable.Hollow sections of door gasketsshall be sealed.
5.9.5.2 Gaskets shall be capable of being removed and reinstalled by hand or with the use of simpletools. Staples,pop rivets,nails, adhesves, and other similar items that cannot be reattached easily shallnot be used to secure door gaskets.
5.9.5.3 Retaining grooves and other devices for holding readily removable gaskets shall be easilycleanable.NSF ANSI 2 pdf download.