Is Valve quality the reason of China chemical EXPLOSION: Yancheng chemical factory In March 21th

As Valve supplier, an occupation habit, each accident /explosion showed in media, we can’t help wondering whether it is caused by valve quality problems?  Although the probability is not necessarily very high. We will constantly remind ourselves to concentrate on improving valve quality and take this as a precaution.

44 killed, at least 90 people were seriously injured in the explosion at the Jiangsu Tianjiayi Chemical Co., the state-run China News Service said Friday, and 32 of them were critically ill. Videos circulating online showed people who appeared to have been cut by glass and other debris, eastern China’s Jiangsu province on 2019 Thursday (March 21) afternoon.

Explosion-in-China-yancheng-chemical-plant-Footage showed people lying on the ground

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China and main country Valve Welding material(electrode) for sealing surface

China Main Valve Sealing surfaceing Electrode Character,Use,Application 

D502 valve surfacing electrode line with GB EDCr-A1-03
Description: D502 is a titanium calcium type coating 1Cr13 valve welding electrode, AC and DC welding technology is good. Surfacing metal is 1Cr13 semi-ferritic chromium steel. Surfacing with air quenching properties, generally not subject to heat treatment, uniform hardness, but also softened by annealing at 750-800 ℃, when heated to 900-1000 ℃ air cooling or oil quenching, re-hardening.
Uses: This is a versatile surfacing welding rod for welding temperature below 450 ℃, carbon steel or alloy steel shafts and valves.
Chemical Composition of Deposited Metal (%) Chemical composition CSP Cr total of other elements
Guaranteed value ≤ 0.15 ≤ 0.030 ≤ 0.040 10.0 ~ 16.0 ≤ 2.50
Surfacing layer hardness: (after welding, air cooling) HRC ≥ 40
Reference current (AC, DC) electrode diameter (mm) φ2.5 φ3.2 φ4.0 φ5.0
Welding current (A) 50 ~ 80 80 ~ 120 120 ~ 160 160 ~ 200 Continue reading “China and main country Valve Welding material(electrode) for sealing surface”