I Sandwich Panel Screw-te A Leak Chhan: EPDM Washer thlan danah tihsual pawimawh tak tak 3

Steel construction industry-ah chuan project pakhat chu a chak lohna ber ang chauh a ni. Vawi tam tak chu, chu point chu thil tenawm tak, ngaihthah mai mai a ni: theEPDM washer hmanga siam a nii self-drilling screw-te chungah.

HmunahDongchao Hardware (DC Screw) hmanga siam a ni., roofing failure za tam tak kan zirchiang tawh a ni. "Leaking roof" complaint tam zawk hi panels ngei atanga lo chhuak a ni lo va, low-quality seal tihchhiat emaw installation torque dik lo vang a ni zawk. Hetah hian kum 15+ chhunga tui tlak lohna seal neih theih dan tur technical breakdown kan rawn tarlang e.

1. The Material Science: Virgin EPDM leh Recycled Rubber te hi a hlawhtling hle

Black washer zawng zawng hi siam vek an ni lo. Budget-grade screw tam tak chuan recycled rubber emaw PVC blend hmangin sum senso tihtlem nan an hmang thin.

A Hlawhchhamna chu:Recycled rubber hian UV stability a nei lo. Thir inchung lumna nasa tak hnuaiah chuan heng washer-te hi thla 24 chhungin a chhe thei a, a chhe a, a tlahniam a, chu chuan tuiin screw lu a paltlang theihna tur hmun a awmtir a ni.

DC Standard chuan: 1.1.Kan hmang thinA sang-Content Virgin EPDM. Extreme temperature-ah pawh elasticity a vawng reng a,-40℃atanga 120℃thleng a ni. A molecular structure hi screw shank "memory-fit" turin siam a ni a, hei hian metal panel a zau leh a inzawm khawm pawhin seal chu a chhe lo tih a tichiang a ni.

2. "Over-Torque" Trap: Compression Profile dik tak

Onsite error awm fo chu screw thuk lutuka khalh hi a ni. Installer-te chuan "tighter hi a him zawk" an ti fo thin a, mahse hei hi waterproofing atan chuan tihsual thihpui tak a ni.

-Driven hnuaiah hian:Washer hian a compress tawk lo a, metal sheet ridges te chu a engage thei lo.

A aia tam-Driven:Flange hian EPDM chu a tikehsawm a, a sirte chu "mushroom" emaw, chunglam hawia flip emaw turin a nawr a ni. Hei hian tui ding khawlkhawmtu cup te tak te a siam a, galvanic corrosion a ti chak hle.

"Sweet Spot" tih chu:EPDM chu metal flange sir atanga a lan chhuah theih hma loh chuan compress tur a ni a, mahse panel nen chuan a flat reng tur a ni.

3. Engvangin Nge Double-Thread Screws hi Pro duhthlanna a nih

Sandwich panel thick (rock wool emaw EPS emaw) tan chuan standard single-thread screw te hian "panel separation" an nei thei.

KanDouble-Thread Self-Drilling Screw hmanga siam chhuah a nilu hnuaiah secondary thread a awm a, a ri sang zawk a ni. He design hian pawn lam sheet leh chhung lam structure chu a lock khawm a, thli load avanga "pumping effect" awm chu a veng a, a tawpah chuan washer grip a tizau ta a ni.

Technical lam hawi zawng zawng & Size Chart

I roofing project atana fastener dik tak i thlan theih nan a hnuaia kan standardized engineering data hi en la:

Professional Lab Data (Quality Control) hmanga thil tih a ni.

Dongchao EPDM-bonded washer batch tin hian international construction standard zawm turin test na tak an nei vek a:

A khauhna (Shore A): 1.1.65-75 (Metal-to-metal sealing atan a tha ber).

Tensile chakna: 1.1.10.5 MPa aia tam emaw, a tlukpui emaw.

Ozone laka inven theihna:50 pphm (Darkar 72 chhung exposure hnuaiah crack a awm lo).

Salt Spray laka inven theihna:Darkar 500-1500 chhung venhimna atan Ruspert emaw Dacromet coating hmanga siam theih a ni.

Mithiamte Thupui

$0.05 washer hian $50,000 roofing contract chu tichhe suh. EPDM specification dik thlan leh installation torque dik tak enfiah hi leak venna atana hmanraw man tlawm ber pahnih a ni.

Insulation panel sang - tan custom length i mamawh em?Dongchao Hardware hian factory tam zawkin an siam theih loh extra-long fastener (350mm thleng) an siam thiam hle.

Technical consultation emaw, a thlawna sample kit emaw dawng duh tan david@dcscrews.com ah kan Engineering Team te biak theih a ni.