The hammer unions which are produced on the basis of the absorption and digestion of the technologies transferred by American SPM and are used for connecting various pipeline include threaded connection type, welded type and hydrogen sulfide gas resisting type, with the specification being 1～4 and the cold working pressure being 7MPa～140MPa( 1000Psi～20000Psi). For the convenience of distinguish, the unions with different pressure grades have different color identifications and have obvious specification connection modes and pressure grade marks on the wing nuts.
The specification and model of common union( threaded connection type): FIG100, FIG200, FIG206, FIG400, FIG402, FIG602, FIG1002 and FIG1502 The rated working pressure: 7MPa( 1000psi)～105MPa( 15000psi).
Weld union specification : FIG20、FIG60、 FIG1002、FIG1502、FIG2002；rating working pressure : 14MPa（2000psi）～140MPa（20000psi）
Prevent sulfur weld union : FIG602、FIG1002、FIG1502、FIG2202、Tr120×6、Tr150×6、Tr180×8；rating working pressure : 35MPa（5000psi）～105MPa（15000psi）
Credibility seal performance :
The seal ring is made of imported sizing materials through compression, so that its loading capacity and sealing property are improved greatly and prevent the joint from corrosion. The sealing types differ according to the pressure and application range.
Quick installation:
Regardless of position and space, the wing nut and rigid self-locking type ACME thread are so designed that they can be quickly tightened and dismounted without using special tools.
Highly interchangeability:
The structure and coupling dimension of all the unions comply with the international product standards, in the unit of inch size the seal rings of unions completely may be interchanged with the products of American SPM and FMC companies the marks of specification and pressure on the wing nut are formed through one-time die forging.
Advanced processing and inspection means:
The spherical joint processed by the high-precision numerical control machine and the LP thread processed by the imported special cutter provide reliable guarantee for high pressure seal All the wing nuts are processed by the numerical control machine, which have no relief groove, so that the product may have sound strength and high bearing pressure The materials for welding unions and the dimension of welding bevel comply with the requirements of APISPEC16C specification The unions used under the sour environment are designed and manufactured according to American NACEMR0175 Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment and APIRP- 14E standard.
防硫焊接由壬规格型号有：FIG602、FIG1002、FIG1502、FIG2202、Tr120×6、Tr150×6、Tr180×8；额定工作压力在35MPa（5000psi）～105MPa（15000psi）之间。
可靠的密封性： 密封圈采用进口胶料压制而成，极大提高了承压能力和密封性能，并使接头处免遭腐蚀。密封形式依压力和应用范围而有所不同。
快捷的安装性：
不管在什么位置或空间，翼形螺母和刚性自锁式ACME螺纹的设计都具有无需特殊工具就可快速上紧、下卸的特点。
高度的互换性：
所有由壬结构、联接尺寸都可以与国际产品接口，全为英制尺寸；由壬密封圈完全可以同美国SPM、FMC公司产品互换；翼形螺母上的规格、压力等标记由模锻一次成形。
先进的加工检验手段： 高精度数控机床加工出的球面接头及进口专用刀具加工出的LP螺纹，是高压密封的可靠保证；翼形螺母均采用数控机床加工，没有退刀槽，使产品强度好，承压高；焊接由壬的材料和焊接坡口尺寸符合APISPEC16C规范的要求；对酸性环境使用的由壬严格按美国NACEMR0175“油田设备用抗硫化物应力开裂材料”和美国石油学会APIRP-14E标准设计制造。
