Quality control::품질110 Expansion joint Expansion joints are devices used to absorb dimensional changes in piping systems, such as those caused bythermal expansion, to prevent excessive stresses/strains being transmitted to other piping components, andconnections to pressure vessels and rotating equipment. While there are several designs, those commonly found in aplant are metallic bellows and fabric joint designs. Metallic bellows ca.. 2016. 2. 18. tubing의 정의 With the exception of heater, boiler, and exchanger tubes, tubing is similar to piping, but is manufactured in many ODs and wall thicknesses. Tubing is generally seamless, but can be welded. Its stated size is the actual OD rather than NPS. Tubing is usually made in small diameters and is mainly used for heat exchangers, instrument piping, lubricating oil services, steam tracing, and similar ser.. 2016. 2. 18. filler metal selection Material with electrode selection Number BASE MATERIAL P.Number ASTM Specification AWS Specification Preheat Temp. C (min) Post heat Temp. C Hardness BHN Max. PIPE TUBE WROUGHT FITTING FORGIN CASTING PLATE Covered Electrode Bare Electrode Preferred Alternate 1 Carbon Steel Carbon Steel 1 A53 A106 A178 A179/192 A234 Gr. WPA/B A181 A105 A 216 A385 A515 E6010 Root E7018 F&F E6013,E7015- E7028 ER70 .. 2016. 2. 17. What is weld metal? Frequently Asked QuestionsWeld metal is the material that has melted and re-solidified as a result of the welding operation. In cases where no filler material is added (resistance, electron beam, laser and some autogenous arc welding), the weld metal has the same composition as the parent material. Where filler materials are added to the weld pool, the composition of the weld metal usually diffe.. 2016. 2. 16. Health and Safety in Welding Frequently Asked Questions In most countries there is extensive legislation assigning responsibilities to employers to take reasonable care of the health and safety at work of their employees (e.g. in the UK the primary legislation is the Health and Safety at Work Act 1974). See also Requirements for Health & Safety information and training Welding is associated with several hazards to health an.. 2016. 2. 15. What is a permit to work? Frequently Asked Questions Situations where a permit-to-work would be appropriate include: High or low voltage electrical work. Work on complex production plant. Work in confined spaces. Work involving naked flames (hot work). Work on roofs. Excavation work. Work on or near asbestos. (This is not an exhaustive list) 작업에 대한 허가가 적합 할 상황은 다음과 같습니다 : 높거나 낮은 전압의 전기 작동 복잡한 생산 공장에서 작업 밀폐 된 공간에서 작업 화기 (.. 2016. 2. 15. 이전 1 2 3 4 5 6 7 8 ··· 19 다음 반응형