本标准描述了直径为16英寸的钢瓶和钢丝加固环向预应力混凝土压力管的制造。（410毫米）至144英寸。（3660毫米）由钢瓶和钢丝加固制成。本标准描述了内衬圆筒管，其芯由内衬混凝土的钢筒组成，随后用钢丝包裹并涂有预混合水泥砂浆；以及嵌入式圆筒管，其芯由包裹在混凝土中的钢筒组成，随后用钢丝包裹并涂有预混合水泥砂浆。本版C301的主要修订包括:用于制造管道用钢瓶的钢的最低屈服强度要求增加。在钢筋要求中，最大碳当量为0.55%的一致性标准发生了变化。 在扁钢的材料要求中，删除了可选的一致性等级。增加了一项关于测试报告的要求，该报告显示了垫圈制造中使用的橡胶化合物的物理性能。对钢丝上砂浆涂层的最低覆盖要求增加了一个新的公差。增加了管芯混凝土强度测试的要求。对于预应力钢筋的放置，钢丝断裂时需要采取的措施已经改变。增加了多层预应力钢丝的规定。对配件衬里和涂层的要求进行了广泛修改。

This standard describes the manufacture of circumferentially prestressed concrete pressure pipe with a steel cylinder and wire reinforcement in diameter sizes 16 in. (410 mm) through 144 in. (3,660 mm) manufactured with a steel cylinder and wire reinforcement. The standard describes lined-cylinder pipe with a core composed of a steel cylinder lined with concrete and subsequently wire-wrapped and coated with premixed cement mortar and embedded-cylinder pipe with a core composed of a steel cylinder encased in concrete and subsequently wire wrapped and coated with premixed cement mortar.Major revisions to this edition of C301 include:The minimum yield strength requirement of steel used in the manufacture of cylinders for pipe has increased.In the requirements for steel bar reinforcement, the conformance standard for the 0.55 percent maximum carbon equivalency has changed.In the material requirements for flat steel bars, an optional conformance grade has been removed.A requirement has been added regarding test reports showing the physical properties of the rubber compound used in the manufacture of gaskets.A new tolerance has been added to the minimum cover requirement of mortar coating over wire.A requirement in the testing of concrete strength for the pipe core has been added.For placement of prestressing wire reinforcement, the required action to be taken in case of wire breakage has changed.Provisions for multiple layers of prestressing wire have been added.Requirements for linings and coatings for fittings have been modified extensively.