Standard the sample is equivalent to using mechanical industry standard JB / T 8130.1-1999 "Constant Spring support and hanger"; 2.The JB / T 8130.1-1999 Department of the constant force spring hanger "straighten out the original GB10181- made 88 industry standard. Customary, the product is still referred to as "GB constant force spring hanger. GB constant hanging structure GB constant hanging category and type categories form of hanger fixed and pipeline equipment branch hanging form of flat PHA fixed frame roof with double rod and supporting member connected suspension the following fixed piping and equipment PHB framework Roof connected with a single rod and the support member, the suspension piping and equipment PHC below the fixed frame top plate with a single hole lug plate and the supporting member is connected, the fixed frame of the suspension piping and equipment below PHD backplane is mounted on the support member, the suspension following pipeline and equipment the PHE fixed framework of the roof with two holes ear plate supporting member connected to suspension following piping and equipment vertical double rod and supporting member connected LHA fixed frame roof, suspension following piping and equipment the LHB fixed framework roof with a single trolley with support member connecting the suspension pipes and equipment below the LHC a fixed framework roof with single-hole ear plate supporting member connected to suspension following pipeline and equipment the LHE fixed framework roof with two holes ear plate supporting member connected, suspension following piping and equipment seat spring cover tube formula ZHA bottom plate is mounted on the support member, suspended below the piping and equipment ZHB spring cover cylinder floor panel mounted on the support member, the support above the pipes and equipment four the representation of the model performance, Features 1. load , the displacement range. Load Range: 0.12 kN-315.99 kN; displacement range: 50 mm-400 mm; constant degrees (load deviation) requirements: the absolute value of ≤ 6%; relative load deviation degree: absolute value ≤ 5%; the site load adjustment amount: not less than ± 10%; constant hanging instructions signage with load and displacement; constant crane selection based on the constant hanging bearing load requirements and the actual displacement, select the following examples: Example: a refinery down the factory pipes, thermal displacement of 215 mm displacement, requires constant hanging withstand 32.61 kN load, try to choose constant hanging. Solutions: (1) determine the displacement margin and the total displacement Tb: Usually displacement margin of 20% of the thermal displacement of Ts, and not less than 20 mm to calculate the total displacement: TB = Ts + (Ts * between 20% and 20 of the large-value) = 215 +215 * 0.2 = 258 mm look-up table 1B displacement series table, according to the principle of relying on the nearest to determine the total displacement of Tb: 260 mm ⑵ select the constant hanging constituencies and Specifications No.: load capacity = load × total displacement = 32.61 × 260 = 8478.6 kNmm look-up table 2B load capacity table, according to the principle of proximity, elected constant hanging: Ⅵ group, the look-up table 1B displacement series table No. 50, according to the principle of relying on the nearest, to determine the total displacement Tb: 260 mm ⑶ according to the space installation conditions and the actual use requirements, select the type of constant hanging; and table look 5B, determine interface dimensions d1, d2. The above example, if the horizontal space is large, two suspension points can be used flat constant hanging boom material is 35 steel, from Model: PHA50-260/32.54X-M30 PHE50-260/32.54X-M30