Products description
ERW namely Electric resistance welding
prouducts:efw stainless steel pipe,efw welded tubes,duplex stainless steel welded pipes,ss welded tubing
ERW pipe and submerged arc welding pipe significantly different, with the pressure welding without filler metal, weld not filled with other ingredients, by high-frequency current skin effect and proximity effect, instantly heating the plate edge to welding temperature by squeezing rollers squeeze forging formed weld tissue. Require the use of high-quality steel pipe weld line or off-line heat treatment, welding zone structure refinement, quality ERW pipe welds and base metal can reach the same level of toughness, which is submerged arc welding process can not be achieved.
EFW namely electric welding Electric fusion welding of the first letter abbreviation
Submerged arc welding (SAW) - Electric welded (EFW) one, is through one or more consumable electrode between the workpiece and the heating of the metal between the metal binding in a process, the arc of the metal and filling material sufficient
STANDARD :
· ASTM/ASME：A213/SA213 A249/SA249 A268 A312/SA312 A269 A778
· JIS：G3459 G3446 G3447 G3448 G3459 G3463 G3468
· DIN：17455 17456 17457 17458 17459 2391 2462
· EN：10216-5 10217-7
· GOST9941 GOST9940
· NFA NACE API ISO HAF
GRADE :304/304L/304H;321/321H;316/316L/316H;316TI;317L;347H;310S;UNS31803;UNS32750/U NS08904L,TP410/TP410S;ECT
Test Repprts:pmi test reports, en10204.3.1 certificate , nabl approved lab report on chemical and mechnical properties ndt or other test reports , 100% x-ray welding reports.
Applications:
l heat exchangers condensers . evaporators . heating coils. digesters. fluid piping
l sugar mills.dairies .breweries. food processing
l pharmaceuticals. chemical . petrol chemicals
l power plants
l paper&pulp manufacturing
l textile industries
l automobile exhaust pipes
l general engineering industries
l hospital and kitchen equipment
l furniture and interior decoration
Test Reports:
pmi test reports, en10204.3.1 certificate , nabl approved lab report on chemical and mechnical properties ndt or other test reports , 100% x-ray welding reports.
