What is the allowable deviation of various types of PVC pipe fittings?

Update:09-01-2021
Summary:

Average outer diameter limit deviation bai difference d […]

Average outer diameter limit deviation bai difference dm-de Nominal outer diameter de Average outer diameter limit deviation dm-de Nominal outer diameter de Average outer diameter limit deviation dm-de 2.5 3 4 5 6 8 10 12 16 20 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 25 32 40 50 63 75 90 110 125 140 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.3 +0.4 +0.4 +0.5 160 180 200 225 250 280 315 355 400 450 +0.5 +0.6 +0.6 +0.7 +0.8 +0.9 +1.0 +1.1 +1.2 +1.4 500 560 630 710 800 900 1000 +1.5 +1.7 +1.9 +2.2 +2.4 +2.7 +3.0 3.2.2.


  

 

PVC: Polyvinyl chloride (English: PolyVinyl Chloride, abbreviated as: PVC) is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. PVC is a white powder with an amorphous structure with a small degree of branching. The molecular weight of industrially produced PVCPVC Elbows Wholesalers is generally in the range of 50,000 to 120,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature. There is no fixed melting point. It starts to soften at 80~85℃, becomes viscoelastic at 130℃, and becomes viscous at 160~180℃. Its tensile strength is about 60MPa, impact strength is 5-10kJ/m2; it has excellent dielectric properties. The stability to light and heat is poor. It will decompose to produce hydrogen chloride above 100°C or after long-term sunlight exposure, and auto-catalytically decompose to cause discoloration. In practical applications, stabilizers must be added to improve the stability to heat and light. PVC is very hard and can only be soluble in a few solvents such as cyclohexanone, dichloroethane and tetrahydrofuran. It is stable to organic and inorganic acids, alkalis, and salts, and its chemical stability decreases with increasing use temperature.