日标方管：产品规格方面，大口径、高要求的不锈钢管及超长管等，缺口较大；一般用途的中不锈钢管的生产能力大于市场需求。产品数量方面，较高标准的工业用焊管，尤其是高要求的工业用管基本是空白，普通不锈钢管的产量与市场总体需求平衡，普通无缝管的生产能力过剩，中、低档次标准的不锈钢装饰焊管市场供大于求。近十年来，随着应用领域的迅速扩展，国内对不同材质、不同规格、不同品种、不同用途的不锈钢管需求猛增；加上不锈钢管高附加值的吸引，生产不锈钢管材的企业从8年代时的十几家发展到目前的4多家，综合生产加工能力超过1万吨，实际产量从的5万吨增加到1999年的39万吨；产量达5吨水平的企业很少，多数是年产1吨以下的小厂。
日标方矩管尺寸表：
150x75x6MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (19.34 KG/M)
140x140x5MM (SHS) SQUARE STEEL HOLLOW SECTION (21.10 KG/M)
150x100x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.70 KG/M)
140x140x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (26.30 KG/M)
150x100x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (23.30 KG/M)
140x140x8MM (SHS) SQUARE STEEL HOLLOW SECTION (32.90 KG/M)
150x100x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (29.10 KG/M)
140x140x10MM (SHS) SQUARE STEEL HOLLOW SECTION (40.40 KG/M)
150x100x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (35.70 KG/M)
140x140x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (49.50 KG/M)
150x100x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (43.60 KG/M)
150x150x5MM (SHS) SQUARE STEEL HOLLOW SECTION (22.70 KG/M)
160x80x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (18.00 KG/M)
150x150x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (28.30 KG/M)
160x80x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.30 KG/M)
150x150x8MM (SHS) SQUARE STEEL HOLLOW SECTION (35.40 KG/M)
160x80x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (27.90 KG/M)
150x150x10MM (SHS) SQUARE STEEL HOLLOW SECTION (43.60 KG/M)
160x80x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (34.20 KG/M)
150x150x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (53.40 KG/M)
200x100x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (22.70 KG/M)
150x150x16MM (SHS) SQUARE STEEL HOLLOW SECTION (66.40 KG/M)
200x100x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (28.30 KG/M)
180x180x5MM (SHS) SQUARE STEEL HOLLOW SECTION (27.40 KG/M)
200x100x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (35.40 KG/M)
日标矩形管参数表：
180x180x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (34.20 KG/M)
200x100x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (43.60 KG/M)
180x180x8MM (SHS) SQUARE STEEL HOLLOW SECTION (43.00 KG/M)
200x100x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (53.40 KG/M)
180x180x10MM (SHS) SQUARE STEEL HOLLOW SECTION (53.00 KG/M)
200x100x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (66.40 KG/M)
180x180x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (65.20 KG/M)
250x150x5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (30.50 KG/M)
180x180x16MM (SHS) SQUARE STEEL HOLLOW SECTION (81.40 KG/M)
250x150x6.3MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (38.20 KG/M)
200x200x5MM (SHS) SQUARE STEEL HOLLOW SECTION (30.50 KG/M)
250x150x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (48.00 KG/M)
200x200x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (38.20 KG/M)
250x150x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (59.30 KG/M)
200x200x8MM (SHS) SQUARE STEEL HOLLOW SECTION (48.00 KG/M)
250x150x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (73.00 KG/M)
200x200x10MM (SHS) SQUARE STEEL HOLLOW SECTION (59.30 KG/M)
250x150x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (91.50 KG/M)
200x200x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION(73.00 KG/M)
300x200x6.3MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (48.10 KG/M)
200x200x16MM (SHS) SQUARE STEEL HOLLOW SECTION (91.50 KG/M)
300x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (60.50 KG/M)
250x250x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (48.10 KG/M)
300x200x10MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (75.00 KG/M)
250x250x8MM (SHS) SQUARE STEEL HOLLOW SECTION (60.50 KG/M)
日标管材重量表：
300x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (92.60 KG/M)
250x250x10MM (SHS) SQUARE STEEL HOLLOW SECTION (75.00 KG/M)
300x200x16MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (117.00 KG/M)
250x250x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (92.60 KG/M)
400x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (73.10 KG/M)
250x250x16MM (SHS) SQUARE STEEL HOLLOW SECTION (117.00 KG/M)
400x200x10MM(RHS) RECTANGULAR STEEL HOLLOW SECTION (90.70 KG/M)
300x300x6.3MM (SHS) SQUARE STEEL HOLLOW SECTION (57.90 KG/M)
400x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (112.00 KG/M)
300x300x8MM (SHS) SQUARE STEEL HOLLOW SECTION (73.10 KG/M)
400x200x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (142.00 KG/M)
300x300x10MM (SHS) SQUARE STEEL HOLLOW SECTION (90.70 KG/M)
450x250x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (85.70 KG/M)
300x300x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (112.00 KG/M)
450x250x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (106.00 KG/M)
300x300x16MM (SHS) SQUARE STEEL HOLLOW SECTION (142.00 KG/M)
450x250x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (132.00 KG/M)
350x350x8MM (SHS) SQUARE STEEL HOLLOW SECTION (85.70 KG/M)
450x250x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (167.00 KG/M)
350x350x10MM (SHS) SQUARE STEEL HOLLOW SECTION (106.00 KG/M)
500x200x8MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (85.70 KG/M)
350x350x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (132.00 KG/M)
500x200x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (106.00 KG/M)
350x350x16MM (SHS) SQUARE STEEL HOLLOW SECTION (167.00 KG/M)
500x200x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (132.00 KG/M)
400x400x10MM (SHS) SQUARE STEEL HOLLOW SECTION (122.00 KG/M)
500x200x16MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (167.00 KG/M)
400x400x12.5MM (SHS) SQUARE STEEL HOLLOW SECTION (152.00 KG/M)
500x300x10MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (122.00 KG/M)
400x400x16MM (SHS) SQUARE STEEL HOLLOW SECTION (192.00 KG/M)
500x300x12.5MM (RHS) RECTANGULAR STEEL HOLLOW SECTION (152.00 KG/M)
500x300x16MM (RHS) RECTANGULAR STEEL
STKR400方矩管：
为了进一步减少旋塞阀的启闭力拒，通常采用减少旋塞直径的方法，故旋塞阀通常采用矩形流道，此方法在减少旋塞阀启闭力矩的同时，增大了旋塞阀的流体阻力C.旋塞锥体密封部位堆焊STL合金材料或者采用表面硬化技术，增强密封面的耐磨损和抗腐蚀能力，使用寿命长D.旋塞锥体的表面精磨至镜面，和阀体的密封面研磨，具有更低的启闭力矩。压力平衡式旋塞阀为了减少常规硬密封旋塞阀的力矩，常采用压力平衡式旋塞阀。压力平衡式旋塞阀除具有常规油润滑旋塞阀的特点外，还有下列特点：A.压力平衡式旋塞阀的旋塞锥体的安装方式为倒装。
