【正文】 e manual pulley at the opposite side of the stress surface impacted by the wind load will be exposed to great risk, so it is necessary to analyze whether the load of the chain block can meet the work requirements of the bined action of gravity and wind exist.F0 G1F=P*A=*400==G=mg=124*1000*=1215200N=G1=G/h=FO=(F2+G12)1/2=(+)1/2=F1=10*1000*=98000N=98KN∴FO=F1=98其中：FO在重力和風力的共同作用下的合力；F風載荷在罐體正面產(chǎn)生的風力；G罐體的最大起升重力；G1單根桅桿的靜態(tài)承載力；F1手拉葫蘆倒鏈的最大承載力。 Therefore, P=βZμZμSρO=1***= KN/m2 風載荷均布的面積：A=D*H=20*20=400㎡Area by wind load: A=D*H=20*20=400㎡其中： D罐體直徑； H罐體高度。 maximum weight, expanding ring and manual pulley. Therefore, Txx12 (124t) with maximum weight is adopted to carry out this calculation. Detailed tank data is shown in Table 1（Txx12A,xx12B,xx12C, xx10）. 計算過程：Calculation Process 風載荷計算：確定以φ20*20m的儲罐來計算所有直徑φ20m的儲罐的風載荷。具體罐體數(shù)據(jù)見表1（Txx12A,xx12B,xx12C,xx10）。Before every lifting, inspect and make sure the section area of the weld to meet the WPS amp。The installation of the first ring shell and roof shall make the tank body be a confined space. A ring of pads with height of 600mm shall be set along the circumference of bottom plate in accordance with HSE requirement. There are two types of pads: the first one type is make of two segments, a piece of 400mm of 40 H shape steel and another piece of 400mm 20 H shape steel. And the second type is made of a section of φ3258mm seamless pipe, 600mm long. One side of the pipe shall be welded with a piece of 600400mm steel plate with thickness of 10mm as the top of pad to support the tank body. Those pads will be set around the bottom plate circumference every ~2 meters’ distance. 受限空間進出參照PR856000001407《HSE受限或封閉空間》執(zhí)行。When hoisting with manual pulleys, the main potential safety hazard is that if the chain of one of the manual pulleys is broken down, the tank body will tilted to the side with broken chain due to the weight of tank body, which will thus cause other adjacent manual pulleys to be broken down due to the added weight and produce a serial of chain reaction and safety accident.，即使在斷一條鏈時，另外臨近兩個手拉葫蘆仍能承受相應增加的罐體重量，以此符合HSE要求。Lower the expanding ring when the seam is cooled down and check the circle of tank wall.，直至最后一圈壁板組焊完成。縱縫和環(huán)縫焊完后，應按設計要求對壁板的幾何尺寸和焊縫質(zhì)量進行檢驗。Riveters dock the tank wall when it has been hoisted into the right place. The time spent on dock depends on tank diameter, if the tank diameterφ≤16, it needs hours。 A person specially assigned shall conduct the pulley operators. When the tank body is lifted every 30mm height, the person shall be responsible for checking the hoisting of tank wall to ensure that the lifting speed is consistent in all directions and to keep the lifting as consistent as possible. The time spent on lifting individual ring depends on tank size, weight. Generally speaking: if the tank diameterφ≤16 meters, and each pulley loading smaller than 1/3 of maximum loading, it shall cost 2 hours for hoisting one ring。First, mark out guide lines (100mm width each) at 35m intervals on the upper opening of lower ring of tank shell plates.，每提升300mm由專人檢查罐壁的提升平衡情況，盡量做到步驟一致，保證各個方向提升速度一致。One gantry plate shall be set up at each side of post, 500mm away from the center of post. Other gantry plates shall be set at 1500mm intervals.Installation and lifting of tank shell plates。脹圈的安裝應找平，以防止提升時引起罐體的偏斜。脹緊后在脹圈千斤頂接頭的兩側(cè)各用一個傳力筋板（龍門板）扣住分別焊在罐壁上，并用銷子與罐壁打?qū)崱?tank top and its handrail have been welded and installed, you can prepare and install expanding ring insegments according to the internal diameter of tank wall. Expanding ring is made of profile steel and curved according to the curvature required by the diameter of tank body. The segment number is decided by the calculation of forces applied. WPS and Check Records Forms of expanding ring, mast, hosting ear can be found in Welding Construction Procedure PRXX00000001.。After all the following work has been done and checked out: base plate of the tank has been surface treated for anticorrosion and laid out, welded and installed。在安裝過程中，必須認真進行幾何尺寸，焊接質(zhì)量檢驗。墊板與底板點焊，在其上表面劃出壁板安裝線，在線兩側(cè)點焊擋板。 if the maximum lift weight is more than 35 and smaller than 95t with diameter smaller than 20m, additional inclined support shall be supplied. Such a layout can ensure adequate strength of individual post and also turn all the posts into a closed system that adequately ensures the stability of hoisting system consisted by posts. 使用前，應進行空載試驗，檢查工作是否正常可靠是否正常工作。這樣布置既可使單個立柱有足夠的剛度，又使所有立柱形成封閉系統(tǒng)，充分保證立柱組成的提升系統(tǒng)的穩(wěn)定性。――is the deduction coefficient with a range of G――單臺手拉葫蘆的額定起重量；G――is the rating load of single manual pulley ：Table 1. List of quantity of manual pulleys序號Sequence number儲罐編號Number of tank相對應的計算書According to calculation sheet儲罐名稱Name of tank儲罐尺寸(mm)Dimensions of tank (mm)儲罐容積(m3)Volume of tank (m3)儲罐起重重量(t)Weight of tank that be put up (t)手拉葫蘆數(shù)量(臺)Quantity of manual pulley (set)手拉葫蘆型號(t)Model of manual pulley (t)桅桿規(guī)格 Model of the backstay (￠mmmm)漲圈規(guī)格 Model of the Swell loop桅桿間距離Distance of eath backstay(m)單支桅桿承重eath backstay weight(t)1Txx12A1污水儲罐Waste water tankΦ20000x16000502712420102xx7 ［182Txx12B1污水儲罐Waste water tankΦ20000x16000502712420102xx7 ［183Txx12C1污水儲罐Waste water tankΦ20000x16000502712420102xx7 ［184Txx101苯乙酮儲罐Hypnone reverse tankΦ20000x1200037706220102xx7 ［185Txx01A2純堿儲罐Sodium carbonate reserve tankΦ16000x1500030169316102xx7 ［166Txx01B2純堿儲罐Sodium carbonate reserve tankΦ16000x1500030169316102xx7 ［167Txx014MPG產(chǎn)品儲罐MPG product reserve tankΦ15000x1300022975312101596 ［168Txx024MPG產(chǎn)品儲罐MPG product reserve tankΦ15000x130002297531210