On the evening of March 2nd, the Sanitation Department of Xiangtan City organized nearly 300 non-line management personnel and 13 sprinklers to carry out major road cleaning operations and launched the first battle of the 100-day sanitation campaign. In the future, the cleaning of roads every Monday will become the norm for the cleaning of urban roads, achieving a quantum leap from cleaning to washing.
The cleansing officers and soldiers proceeded to clean the road from Hexi Linyuan Flyover and Hedong Construction Crossroads, and gradually rolled out to the main and secondary roads in the city. In the Linyuan Tianqiao section, the sprinkler sprayed water on the ground, washing personnel lined up, swept the broom along the direction of the water flow, washed the road hard, and the sewage flowed into the sewer.
In order to achieve good results in the rectification operations, Xiangtan City Environmental Protection Office has purchased 22 sets of environmental sanitation machinery and equipment worth 6 million yuan, including scrubbers, sprinklers, garbage collection vehicles, and slag removal vehicles. Work efficiency. Issued 11,000 publicity proposals on city remediation and remediation, and organized more than 100 people to go deep into each road section to advertise each one of the houses and stores one by one to gain the cooperation of the public and jointly maintain environmental sanitation and solicit opinions from the stores on the collection of garbage services by sanitation workers. The operating mode was improved. According to the business volume, each road and each community was re-staffed and staffed, the number of staff was increased, and supervision was strengthened to ensure that there were no jobs. The sections of Fuzhou Road, Hedong Avenue, Shuangyong Road and Xiafu Road are used as full-time cleaning roads to create a bright spot for cleaning work. Road section garbage collection staff to increase service efforts, agreed with the store to collect time, according to the requirements of on-site visits, and increase the number of collections, and even take the initiative to help owners dump waste, improve service quality. Also through the government procurement of 1,500 fruit bins, placed in the main and secondary roads. In addition, the Environmental Sanitation Branch organized two groups of heads of staff and business management personnel to visit and learn from Zhuzhou. They learned from the experience of other places and did a good job in sanitation and cleaning.
In Petro and chemical industry for flange connections Stud Bolts and Hex Bolts are used.
The quantity of bolts for a flange connection will be given by the number of bolt holes in a flange, diameter and length of bolts is dependent of flange type and Pressure Class of flange.
Stud Bolt length are defined in ASME B16.5 standard. The length in inches is equal to the effective thread length measured parallel to the axis, from the first to the first thread without the chamfers (points). First thread is defined as the intersection of the major diameter of the thread with the base of the point.
| 1) | Standards: |
Based on DIN & ANSI & JIS & IFI and per drwing |
| 2) | Material: | carbon steel, alloy steel, stainless steel |
| 3) | bolt Size: | M4-M42,3/8"--7/8" |
| 4) | bolt Surface: | Plain,Zinc ,HDG,DAC,Geomet |
| 5) | bolt Thread: | UNC, UNF, Metric Thread |
| 6) | bolt Quality control : | ISO 9001 |
| 7) | bolt Package : | Small box ,Poly Bag,Carton+Pallet |
Grades of Stud Bolts
Below a table with materials and grades for flanges, thread rods (bolts) and nuts, arranged on design temperature, flanges, thread rods and recommended nuts.
|
DESIGN TEMP. |
FLANGES |
GRADE THREAD RODS |
GRADE NUTS |
| -195° to 102°C |
ASTM A182 Gr. F304, F304L, F316, F316L, F321, F347 |
A320 Gr.B8 Class2 | A194 Gr.8A |
| -101° to -47°C |
ASTM A350 Gr.LF3 |
A320 Gr.L7 | A194 Gr.7 |
| -46° to -30°C |
ASTM A350 Gr.LF2 |
A320 Gr.L7 | A194 Gr.7 |
| -29° to 427°C | ASTM A105 | A193 Gr.B7 | A194 Gr.2H |
| 428° to 537°C |
ASTM A182 Gr.F11, F22 |
A193 Gr.B16 | A194 Gr.2H |
| 538° to 648°C |
ASTM A182 Gr.F11, F22 |
A193 Gr.B8 Class1 | A194 Gr.8A |
| 649° to 815°C |
ASTM A182 Gr. F304H, F316H |
A193 Gr.B8 Class1 | A194 Gr.8A |
|
DESIGN TEMP. |
FLG'S |
GRADE THREAD RODS |
GRADE NUTS |
Stud Bolts, Heavy Nuts, Stud Bolts With 2 Nuts, Hex Bolts, 2H HDG Nuts, Galvanized Bolts and Nuts
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