雙排螺栓壓緊管夾A11，英文名稱為Double-row-bolt tighten pipe clamp。
扁鋼彎曲半徑r等于其厚度值，材料為碳鋼，用于高壓或震動管道上，應墊以厚1-2mm的石棉墊或石棉橡膠墊。
公司產品包括但不限于Main products from the company contain but not limited as below:
A1 U型螺栓（A1 U-shape bolt）A2 U型螺栓（帶角鋼）（A1 U-shape bolt with Angle steel）A3 導向管卡（A3 Guiding pipe clamp）A4 緊固管卡（A4 Fastening pipe clamp）A5 基準型雙螺栓管夾(A5 Basic double bolt pipe clamp) A6 重型雙螺栓管夾（A6 Heavy double bolt pipe clamp）A7 三螺栓管夾（保溫）（A7 Three bolt pipe clamp with heat preservation）A8 三螺栓管夾（支托用）(A8 Three bolt pipe clamp for bracket) A9 雙排螺栓管夾(A9 Double row bolts pipe clamp)A10 四螺栓管夾（A10 Four bolt pipe clamp）A11 雙排螺栓壓緊管夾（A11 Double row bolt tighten pipe clamp）A12 管卡（保冷管用）(A12 Pipe clamp for cold preservation)A13 雙螺栓管夾（保冷管用）(A13 Double bolt pipe clamp for cold preservation)A14 四螺栓管夾（保冷管用）(A14 Four bolt pipe clamp for cold preservation)A15 雙頭螺紋吊桿(A15 Double thread derrick) A16 吊環型吊桿(A16 The suspension loop type derrick )A17 松緊螺母(A17 Elastic nut )A18 角形吊耳(A18 Angle lug)A19 U形吊耳(A19 U-shape lug)A20 倒U形吊耳（焊接型）(A20 Inverted u-shaped lug type (welding))A21 倒U形吊耳（吊桿型）(A21 Inverted u-shaped lug type (derrick))A22 板式吊耳(A22 plate lug)A23 墊板(A23 plate)A24 支腿加強板(A24 leg stiffened plate)A25 連接板(A25 connection plate)A26 I型滾輪(A26 roller type I)等。